KJV:
But refuse profane and old wives' fables, and exercise thyself rather unto godliness.
NASB:
But have nothing to do with worldly fables fit only for old women. On the other hand, discipline yourself for the purpose of godliness;
KJV:
But strong meat belongeth to them that are of full age, even those who by reason of use have their senses exercised to discern both good and evil.
NASB:
But solid food is for the mature, who because of practice have their senses trained to discern good and evil.
KJV:
Now no chastening for the present seemeth to be joyous, but grievous: nevertheless afterward it yieldeth the peaceable fruit of righteousness unto them which are exercised thereby.
NASB:
All discipline for the moment seems not to be joyful, but sorrowful; yet to those who have been trained by it, afterwards it yields the peaceful fruit of righteousness.
KJV:
Having eyes full of adultery, and that cannot cease from sin; beguiling unstable souls: an heart they have exercised with covetous practices; cursed children:
NASB:
having eyes full of adultery that never cease from sin, enticing unstable souls, having a heart trained in greed, accursed children;