To Distinguish - Hebrews 5:13-14

Hebrews 5:13-14 ESV 

for everyone who lives on milk is unskilled in the word of righteousness, since he is a child. But solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil.

There was a tree in the garden, the tree of the knowledge of good and evil, from which Adam and Eve were commanded not to eat of its fruit. We might be looking at the reason God placed the temptation in the Garden in the first place. 

Without knowing evil, how would we know good? Perhaps the forbidden tree was like the Law in that it serves to help us to see the difference between the two. The fruit opened their eyes. The Law increased our understanding by defining sin and our weakness. 

Jesus came with the final teaching, the fulfillment of everything that went before. This gives us the ability to distinguish good from evil and choose God.