Apostasy

Acts 21:21; 2 Thessalonians 2:3; Hebrews 3:12; Hebrews 10:26,28; 1 Timothy 4:1-3
Though the word “apostasy” does not occur in the AV (KJV), the Greek word occurs from which the English word is derived. In Acts 21:2121And they are informed of thee, that thou teachest all the Jews which are among the Gentiles to forsake Moses, saying that they ought not to circumcise their children, neither to walk after the customs. (Acts 21:21), Paul was told that he was accused of teaching the Jews who were among the Gentiles to apostatize from Moses. Paul taught freedom from the law by the death of the Christ and this would appear to a strict Jew as apostasy. The same word is used in 2 Thessalonians 2:33Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition; (2 Thessalonians 2:3), where it is taught that the day of the Lord could not come until there came “the apostasy,” or the falling away from Christianity in connection with the manifestation of the man of sin. See ANTICHRIST.
Though the general apostasy there spoken of cannot come till after the saints are taken to heaven, yet there may be, as there has been, individual falling away. See, for instance, Hebrews 3:1212Take heed, brethren, lest there be in any of you an evil heart of unbelief, in departing from the living God. (Hebrews 3:12); Hebrews 10:26,2826For if we sin wilfully after that we have received the knowledge of the truth, there remaineth no more sacrifice for sins, (Hebrews 10:26)
28He that despised Moses' law died without mercy under two or three witnesses: (Hebrews 10:28)
, and the epistle of Jude. There are solemn warnings also that show that such apostasy will be more and more general as the close of the present dispensation approaches (1 Timothy 4:1-31Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils; 2Speaking lies in hypocrisy; having their conscience seared with a hot iron; 3Forbidding to marry, and commanding to abstain from meats, which God hath created to be received with thanksgiving of them which believe and know the truth. (1 Timothy 4:1‑3)). Now a falling away necessarily implies a position which can be fallen from, a profession has been made which has been deliberately given up. This is, as scripture says, like the dog returning to his vomit, and the sow to her wallowing in the mire. It is not a Christian falling into some sin, from which grace can recover him; but a definite relinquishing of Christianity. Scripture holds out no hope in a case of deliberate apostasy, though nothing is too hard for the Lord.