Jamieson, Fausset & Brown

strong meat--"solid food." them . . . of full age--literally, "perfect": akin to "perfection" (Heb 6:1). by reason of use--Greek, "habit." senses--organs of sense. exercised--similarly connected with "righteousness" in Heb 12:11. to discern both good and evil--as a child no longer an infant (Isa 7:16): so able to distinguish between sound and unsound doctrine. The mere child puts into its mouth things hurtful and things nutritious, without discrimination: but not so the adult. Paul again alludes to their tendency not to discriminate, but to be carried about by strange doctrines, in Heb 13:9. Next: Hebrews Chapter 6