The Amplified Bible explains the verse in this manner: But solid food is for full-grown men, for those whose senses and mental faculties are trained by practice to discriminate and distinguish between what is morally good and noble and what is evil and contrary either to divine or human law. The fact is that all information and knowledge must first come though the five main senses of seeing, hearing, smelling, tasting, and touching before we can learn anything. We learn the danger of a hot stove