Sound Doctrine is Important
2 Timothy 2:15
Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth.
But speak thou the things which become sound doctrine...
Holding fast the faithful word as he hath been taught, that he may be able by sound doctrine both to exhort and to convince the gainsayers...
For there are many unruly and vain talkers and deceivers, specially they of the circumcision:...
Whose mouths must be stopped, who subvert whole houses, teaching things which they ought not, for filthy lucre's sake.
2 Timothy 4:3
For the time will come when they will not endure sound doctrine; but after their own lusts shall they heap to themselves teachers, having itching ears;...
2 John 9-11
Whosoever transgresseth, and abideth not in the doctrine of Christ, hath not God. He that abideth in the doctrine of Christ, he hath both the Father and the Son.
If there come any unto you, and bring not this doctrine, receive him not into your house, neither bid him God speed:
For he that biddeth him God speed is partaker of his evil deeds.