Watch out for the:
Anti-Messiah/Christ and anti-Messiah/Christ spirit
Here are just a few of the scriptures....
1John.2:18-19: "Little children, it is the last time: and as ye have heard that antichrist shall come, even now are there many antichrists; whereby we know that it is the last time. They [former Christians] went out from us, but they were not of us; for if they had been of us, they would no doubt have continued with us: but they went out, that they might be made manifest that they were not all of us.
 Who is a liar but he that denieth that Jesus is the Christ? He is antichrist, that denieth the Father and the Son.
1John.4 And every spirit that confesseth not that Jesus Christ is come in the flesh is not of God: and this is that spirit of antichrist, whereof ye have heard that it should come; and even now already is it in the world.
2John.1:7 For many deceivers are entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver and an antichrist.
John asked Jesus, "Lord, who is it? Jesus answered, He it is, to whom I shall give a sop, when I have dipped it. And when He had dipped the sop, He gave it to Judas Iscariot, the son of Simon [one of the many antichrists in the world then and today]"
The word "antichrist" and the symbolic number 666.
antichrist spirit was on the backslidden, former disciples of Christ :
In the gospel of John 6:66. This Scripture reads, "From that time many of His [Christ's] disciples went back, and walked no more with Him [backsliders]. These scriptures relate to the scriptures above 1John.2:18-19
Heb. 10:38 Now the just shall live by faith [faith in God's promises]" but if any man draw back " 1John.2:18-19 and John 6:66[become an anti-Christ], my soul shall have no pleasure in him.
Another antichrist whose name was Judas walked with Christ, then walked no more with Christ. There is NO ETERNAL SECURITY.
Today's great falling away of the churches and the secular, one world government have the anti-christ spirit.
2Thes.2[ And now ye know what withholdeth that he might be revealed in
 For the mystery of iniquity doth already work: only he who now letteth will let, until he be taken out of the way.
 And then shall that Wicked be revealed, whom the Lord shall consume with the spirit of his mouth, and shall destroy with the brightness of his coming:
 Even him, whose coming is after the working of Satan with all power and signs and lying wonders,
 And with all deceivableness of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.
 And for this cause God shall send them strong delusion, that they should believe a lie:
 That they all might be damned who believed not the truth, but had pleasure in unrighteousness
Scriptures - the anti-christ - End of the World
Rev.13: And I stood upon the sand of the sea, and saw a beast rise up out of the sea,
having seven heads and ten horns, and upon his horns ten crowns, and upon his heads the
name of blasphemy.
 And the beast which I saw was like unto a leopard, and his feet were as the feet of a bear, and his mouth as the mouth of a lion: and the dragon gave him his power, and his seat, and great authority.
 And I saw one of his heads as it were wounded to death; and his deadly wound was healed: and all the world wondered after the beast.
 And they worshipped the dragon which gave power unto the beast: and they worshipped the beast, saying, Who is like unto the beast? who is able to make war with him?
 And there was given unto him a mouth speaking great things and blasphemies; and power was given unto him to continue forty and two months.
 And he opened his mouth in blasphemy against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven.
 And it was given unto him to make war with the saints, and to overcome them: and power was given him over all kindreds, and tongues, and nations.
 And all that dwell upon the earth shall worship him, whose names are not written in the book of life of the Lamb slain from the foundation of the world.
 If any man have an ear, let him hear.
 He that leadeth into captivity shall go into captivity: he that killeth with the sword must be killed with the sword. Here is the patience and the faith of the saints.
 And I beheld another beast coming up out of the earth; and he had two horns like a lamb, and he spake as a dragon.
 And he exerciseth all the power of the first beast before him, and causeth the earth and them which dwell therein to worship the first beast, whose deadly wound was healed.
 And he doeth great wonders, so that he maketh fire come down from heaven on the earth in the sight of men,
 And deceiveth them that dwell on the earth by the means of those miracles which he had power to do in the sight of the beast; saying to them that dwell on the earth, that they should make an image to the beast, which had the wound by a sword, and did live.
 And he had power to give life unto the image of the beast, that the image of the beast should both speak, and cause that as many as would not worship the image of the beast should be killed.
 And he causeth all, both small and great, rich and poor, free and bond, to receive a mark in their right hand, or in their foreheads:
 And that no man might buy or sell, save he that had the mark, or the name of the beast, or the number of his name.
 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
Rev.15 And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.
Dan.8: And out of one of them came forth a little horn, which waxed exceeding great,
toward the south, and toward the east, and toward the pleasant land.
 And it waxed great, even to the host of heaven; and it cast down some of the host and of the stars to the ground, and stamped upon them.
 Yea, he magnified himself even to the prince of the host, and by him the daily sacrifice was taken away, and the place of his sanctuary was cast down.
 And an host was given him against the daily sacrifice by reason of transgression, and it cast down the truth to the ground; and it practised, and prospered.
 Then I heard one saint speaking, and another saint said unto that certain saint which spake, How long shall be the vision concerning the daily sacrifice, and the transgression of desolation, to give both the sanctuary and the host to be trodden under foot?
 And in the latter time of their kingdom, when the transgressors are come to the full, a king of fierce countenance, and understanding dark sentences, shall stand up.
 And his power shall be mighty, but not by his own power: and he shall destroy wonderfully, and shall prosper, and practise, and shall destroy the mighty and the holy people.
Dan.9: And he shall confirm the covenant with many for one week: and in the midst
of the week he shall cause the sacrifice and the oblation to cease, and for the overspreading
of abominations he shall make it desolate, even until the consummation, and that
determined shall be poured upon the desolate.
Dan.12: And at that time shall Michael stand up, the great prince which standeth for
the children of thy people: and there shall be a time of trouble, such as never was since
there was a nation even to that same time: and at that time thy people shall be delivered,
every one that shall be found written in the book.
 And many of them that sleep in the dust of the earth shall awake, some to everlasting life, and some to shame and everlasting contempt.
 And they that be wise shall shine as the brightness of the firmament; and they that turn many to righteousness as the stars for ever and ever.
 But thou, O Daniel, shut up the words, and seal the book, even to the time of the end: many shall run to and fro, and knowledge shall be increased.
 Then I Daniel looked, and, behold, there stood other two, the one on this side of the bank of the river, and the other on that side of the bank of the river.
 And one said to the man clothed in linen, which was upon the waters of the river, How long shall it be to the end of these wonders?
 And I heard the man clothed in linen, which was upon the waters of the river, when he held up his right hand and his left hand unto heaven, and sware by him that liveth for ever that it shall be for a time, times, and an half; and when he shall have accomplished to scatter the power of the holy people, all these things shall be finished.
Matt.24: And as he sat upon the mount of Olives, the disciples came unto him
privately, saying, Tell us, when shall these things be? and what shall be
the sign of thy coming, and of the end of the world?
 And Jesus answered and said unto them, Take heed that no man deceive you.
 For many shall come in my name, saying, I am Christ; and shall deceive many.
 And ye shall hear of wars and rumours of wars: see that ye be not troubled: for all these things must come to pass, but the end is not yet.
 For nation shall rise against nation, and kingdom against kingdom: and there shall be famines, and pestilences, and earthquakes, in divers places.
 All these are the beginning of sorrows.
 Then shall they deliver you up to be afflicted, and shall kill you: and ye shall be hated of all nations for my name's sake.
 And then shall many be offended, and shall betray one another, and shall hate one another.
 And many false prophets shall rise, and shall deceive many.
 And because iniquity shall abound, the love of many shall wax cold.
 But he that shall endure unto the end, the same shall be saved.
 And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
 When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand:)
 Then let them which be in Judaea flee into the mountains:
 Let him which is on the housetop not come down to take any thing out of his house:
 Neither let him which is in the field return back to take his clothes.
 And woe unto them that are with child, and to them that give suck in those days!
 But pray ye that your flight be not in the winter, neither on the sabbath day:
 For then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be.
 And except those days should be shortened, there should no flesh be saved: but for the elect's sake those days shall be shortened.
 Then if any man shall say unto you, Lo, here is Christ, or there; believe it not.
 For there shall arise false Christs, and false prophets, and shall shew great signs and wonders; insomuch that, if it were possible, they shall deceive the very elect.
 Behold, I have told you before.
 Wherefore if they shall say unto you, Behold, he is in the desert; go not forth: behold, he is in the secret chambers; believe it not.
 For as the lightning cometh out of the east, and shineth even unto the west; so shall also the coming of the Son of man be.
 For wheresoever the carcase is, there will the eagles be gathered together.
 Immediately after the tribulation of those days shall the sun be darkened, and the moon shall not give her light, and the stars shall fall from heaven, and the powers of the heavens shall be shaken:
 And then shall appear the sign of the Son of man in heaven: and then shall all the tribes of the earth mourn, and they shall see the Son of man coming in the clouds of heaven with power and great glory.
 And he shall send his angels with a great sound of a trumpet, and they shall gather together his elect from the four winds, from one end of heaven to the other.
 Now learn a parable of the fig tree; When his branch is yet tender, and putteth forth leaves, ye know that summer is nigh:
 So likewise ye, when ye shall see all these things, know that it is near, even at the doors.
 Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
 Heaven and earth shall pass away, but my words shall not pass away.
 But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only.
 But as the days of Noe were, so shall also the coming of the Son of man be.
 For as in the days that were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noe entered into the ark,
 And knew not until the flood came, and took them all away; so shall also the coming of the Son of man be.
 Then shall two be in the field; the one shall be taken, and the other left.
 Two women shall be grinding at the mill; the one shall be taken, and the other left.
 Watch therefore: for ye know not what hour your Lord doth come.
 But know this, that if the goodman of the house had known in what watch the thief would come, he would have watched, and would not have suffered his house to be broken up.
 Therefore be ye also ready: for in such an hour as ye think not the Son of man cometh.
 Who then is a faithful and wise servant, whom his lord hath made ruler over his household, to give them meat in due season?
 Blessed is that servant, whom his lord when he cometh shall find so doing.
 Verily I say unto you, That he shall make him ruler over all his goods.
 But and if that evil servant shall say in his heart, My lord delayeth his coming;
 And shall begin to smite his fellowservants, and to eat and drink with the drunken;
 The lord of that servant shall come in a day when he looketh not for him, and in an hour that he is not aware of,
 And shall cut him asunder, and appoint him his portion with the hypocrites: there shall be weeping and gnashing of teeth.