From Milk to Solid Food

Read: Hebrews 5:11–14

“About this we have much to say, and it is hard to explain, since you have become dull of hearing.” — Hebrews 5:11

The writer of Hebrews wants to say something difficult and important about Jesus as our High Priest in the order of Melchizedek. But he stops. He looks at his readers and realizes they aren’t ready for it. So before he goes further, he pauses to say something harder — something about them.

They have been following Christ long enough to be teachers. Instead, they need to be re-taught the elementary principles of the faith. They’re still on milk when they should have moved on to solid food.

What Is Milk?

Paul uses the same image in 1 Corinthians 3:1–4. He couldn’t speak to the Corinthians as spiritual people — they were still infants. The evidence? Division. Quarreling. Contentious spirits. He gave them milk, not solid food, because they weren’t ready.

This tells us something important: the marker of immaturity isn’t just ignorance of doctrine. It’s divisiveness. A contentious, fighting spirit is evidence that the word of Christ hasn’t done its full work. Spiritual immaturity tends to fragment; spiritual maturity tends to unify — “until we all attain to the unity of the faith,” as Paul says in Ephesians 4:13.

For Hebrews, the “milk” is the basic principles: repentance from dead works, faith toward God, baptism, laying on of hands, the resurrection of the dead, and eternal judgment (Hebrews 6:1–2). These are the foundational things — not unimportant, but elementary. Starting with milk is good and right (1 Peter 2:1–3 affirms this). The problem is staying there.

What Does Maturity Look Like?

Hebrews gives us a striking definition: “Solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil.” (5:14)

Two things stand out.

First, maturity is defined by discernment — the capacity to tell the difference between good and evil, between truth and error, between what honors God and what merely resembles it. This is not a simple skill. Genesis 3:22 says that the knowledge of good and evil is something God himself possesses. Isaiah 7:15 describes the capacity to “refuse the evil and choose the good” as a mark of the one who is fully formed.

There is a difference between knowing good and choosing good. Many people know what is right. Mature Christians can actually choose it — consistently, under pressure, in the fog of real life.

Second, this discernment is trained by constant practice. It does not come automatically. It is not inherited. It is developed — through the word, through the community of believers, through hardship, through the daily decisions that either train the conscience or dull it.

Ephesians 4:1–3 and 11–16 describe this growth in terms of the whole body: “speaking the truth in love, we are to grow up in every way into him who is the head, into Christ.” Maturity is both personal and corporate. We do not grow in isolation.

The Warning

The tone of Hebrews here is not gentle. The writer is concerned. He says his readers “have become dull of hearing” — they have moved backward, not simply stayed still. Inattention is not neutrality. Dullness is something that happens to a person who should know better.

Romans 12:2 calls for the active renewal of the mind. The renewed mind does not drift there; it is worked toward, through the ongoing transformation that comes from refusing to be conformed to the patterns of this age.

The warning in Hebrews is not for the brand-new believer. It is for the person who has had time, opportunity, and instruction — and has not grown. That is the uncomfortable audience of this letter, and perhaps, at different moments, all of us.

A Starting Place

This takes practice.

That phrase appears at the bottom of a page of notes on this passage — a simple reminder that no one arrives at discernment by accident. The person who can choose good has practiced choosing good. The person who can distinguish truth from error has practiced reading, thinking, praying, and being corrected.

If you are still on milk — if the deep things of God feel hard to explain, if division feels more natural than unity, if you are not sure how your faith bears on the actual choices of your week — that is not a diagnosis of failure. It is a starting place.

Begin. Stay. Practice.

“I will rejoice in the Lord; I will be joyful in the God of my salvation.” — Habakkuk 3:18