Eat Like a Grown Up

But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil.

Hebrews 5:14 NIV 

My youngest son has now hit his teens and his taste buds are beginning to mature. He still prefers pizza, but, he'll eat a good steak now.  

As you mature you learn what is good for you and makes you stronger. Spiritual maturity is when we constantly train ourselves to distinguish good from evil. 

Let me ask you this: Shouldn't that be easy?