Hebrews 5:11-14

We have much to say about this, but it is hard to explain because you are slow to learn. In fact though by this time you ought to be teachers, you need someone to teach you the elementary truths of God's word all over again. You need milk, not solid food! Anyone who lives on milk, being still an infant, is not acquainted with the teaching about righteousness. But solid food is for the mature, who by constant use have trained themselves to distinguish good from evil.

you need someone to teach you the elementary truths
Hebrews 6:1-2 Therefore let us leave the elementary teachings about Christ and go on to maturity, not laying again the foundation of repentance from acts that lead to death, and of faith in God, instruction about baptisms, the laying on of hands, the resurrection of the dead, and eternal judgment.

You need milk, not solid food!
1 Corinthians 3:2 I gave you milk, not solid food, for you were not yet ready for it. Indeed, you are still not ready.
1 Peter 2:2 Like newborn babies, crave pure spiritual milk, so that by it you may grow up in your salvation, ...

Anyone who lives on milk, being still an infant
1 Corinthians 14:20 Brothers, stop thinking like children. In regard to evil be infants, but in your thinking be adults.

But solid food is for the mature
1 Corinthians 2:6 We do, however, speak a message of wisdom among the mature, but not the wisdom of this age or of the rulers of this age, who are coming to nothing.

who by constant use have trained themselves to distinguish good from evil
Isaiah 7:15 He will eat curds and honey when he knows enough to reject the wrong and choose the right.

NOTES:
Lazy: Hebrews 6:12 We do not want you to become lazy, but to imitate those who through faith and patience inherit what has been promised.

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984 by International Bible Society. Used by permission. All rights reserved worldwide.