KJV: This is a faithful saying, and these things I will that thou affirm constantly, that they which have believed in God might be careful to maintain good works. These things are good and profitable unto men.
NASB: This is a trustworthy statement; and concerning these things I want you to speak confidently, so that those who have believed God will be careful to engage in good deeds. These things are good and profitable for men.
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.