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Christian Living•8 min read

What It Means to Finally Grow Up in the Areas You Already Know

Maturity is not discovering a thousand new truths. Sometimes it is deciding that the truths you already know will finally govern the way you live.

By Kris EmersonEpisode 40 · Hey I'm 40!Originally aired 2019Article adapted 2026
Key takeaways
Maturity often means applying truths you have known for years instead of merely learning more.
Defensiveness, paralyzing self-doubt, and dwelling on the past can be deliberately put away.
Christian confidence stays humble because it is rooted in what God can do through you.

There are moments when a birthday, transition, or ordinary day becomes a line in the sand. Nothing magical changes about the calendar, but something changes inside you: you decide certain patterns have had enough time.

That was the idea behind the phrase “Hey, I’m 40.” It was less about age than maturity. Truths that had been known for years needed to become settled convictions rather than occasional experiments.

Stop reopening debates that should already be settled

Jesus plainly taught against a life consumed by worry. Paul described himself in Philippians 3 as pressing forward rather than living backward. Knowing those truths is one thing. Maturity asks whether you are finally willing to live as though they are true.

Some habits survive because we keep treating them like open questions. Growth sometimes sounds like, “I already know this does not belong, and I am finished giving it room.”

Trade defensiveness for peace

One change described in the episode was refusing the default need to defend yourself. Not every misunderstanding requires a case. Not every criticism deserves a courtroom.

There are times to explain, but there is also freedom in realizing that your integrity does not have to be constantly proved in every conversation.

Replace paralyzing self-doubt with controlled confidence

Christian humility does not require believing you are useless. Apart from the Lord you are nothing, but with the Lord you are a person who can act, serve, speak, and move forward.

Controlled confidence is confidence that remains submitted to God. Because it is not desperate to prove itself, it often becomes more useful to other people.

Let the past become past

When you stop repeatedly judging yourself and others by what already happened, two things become possible: deeper attention to the present and greater optimism about the future.

Peter himself matured dramatically from the younger man we meet in the Gospels into the steady voice of his later letters. Growth is possible. The question is whether you are willing to decide that some old patterns have had enough time.

Maturity often begins when you decide, “The time already passed is sufficient for that.”
Think about it

Take the idea with you.

  1. 01What pattern have I known for a long time does not belong in my life?
  2. 02Where am I still defaulting to defensiveness or self-doubt?
  3. 03What would mature confidence look like today?
From Excel Still More

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This article was adapted from Episode 40 · Hey I'm 40!. Continue with the podcast for the original teaching in Kris’s voice.

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