NET
14 But solid food is for the mature, whose perceptions are trained by practice to discern both good and evil.
Darby
14 but solid food belongs to full-grown men, who, on account of habit, have their senses exercised for distinguishing both good and evil.
KJV
14 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.