2 Tim 2:15    Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.

16 But shun profane and vain babblings: for they will increase unto more ungodliness.

17 And their word will eat as doth a canker: of whom is Hymenaeus and Philetus;

18 Who concerning the truth have erred, saying that the resurrection is past already; and overthrow the faith of some.

     The main point in these verses is this: Some teachers of God’s Word do err in their understanding of the main part of The Gospel, and these ‘overthrow the faith of some’ Christians. You might ask, "How is the faith of some overthrown?" If a new babe in Christ is taught doctrines that are not supported in God’s Word, and that ‘new babe’, still drinking the ‘milk’ of The Word is not able to ‘rightly divide’, or discern the Truth of The Word, that new Christian’s faith can be misdirected into following the Antichrist, masquerading as Jesus, when he (Satan) comes to earth as a false messiah, before the True Jesus Christ Messiah does, our Lord and Saviour The KING (count the Trumpets of Revelation to know when our Lord and Saviour Jesus Christ returns. Those seven trumpets are in order of sounding). Their wonderful new faith which is feeding their emotions, and is God’s Love, is manipulated into accepting false doctrines of men by deceived or false teachers. And when that false doctrine is something like, "You don’t have to worry; no one understands the Book of Revelation; just believe in Jesus and you’ll be saved," well, teachings like the above keep that ‘new babe’ in Christ on the ‘milk bottle.’ Man’s doctrine trying to become the source of that ‘real milk’ of Christ’s Word, really is nothing more than ‘powdered milk’, or in the sense of Isaiah 1:22, "...thy wine mixed with water," the ‘wine’ being the Blood of Christ and His Word. The really dangerous point is when the new Christian, becoming older, still on the ‘bottle’, becomes a teacher, and the next generation is on the bottle... well, you can imagine the continued state of confusion. Then a doctrine like: "Don’t worry, Jesus is returning soon, just believe and you’ll be taken out before Satan comes and all the bad stuff happens."
     Then some would say that "God wouldn’t allow His Word to be mistaught! That can’t happen!" Read 2 Thess. 2 and you’ll find that God does allow ‘strong delusion’ for those who don’t read His Word for themselves, and thereby learn how to expose false teachers. God tells us all the way back in Judges 2 that because His children wouldn’t ‘hearken’ unto Him, the only One and True Living God, He would use these ‘false ones’ to prove His children to see if they would follow Him, or ‘not’. ‘False teachers’ of God’s Word... There’s the heart of today’s problem in many Church systems (not all, but many). Most Christians simply are not aware that these false teachers can exist in some pulpits when God’s Word warns us over and over:

2 Cor 11:3    But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.

4   For if he that cometh preached another Jesus, whom we have not preached, or if ye receive another spirit, which ye have not received, or another gospel, which ye have not accepted, ye might well bear with him.

     The verses above are from Paul to the Corinthians. He is saying: "I’m afraid for you, that you might be beguiled (‘wholly seduced’ in the Greek) by the serpent.

 (Satan, Rev.20:2),

As Eve was through his subtle ways, so that your minds would be torn away from Jesus’ simple teachings." Since Paul has pointed out a specific past event, such as Eve being 'beguiled' by the 'serpent' of Genesis, which is Satan, the deception of Satan is the main subject of Paul's message here. In verse 4, Paul is more specific by saying in similar words: "For if someone comes preaching (teaching) another Jesus...