When we talk about faith, we often define it. We explain it. We defend it.
But we don’t always talk about what faith produces.
Faith has side-effects.
Not the negative kind you see listed at the end of a pharmaceutical commercial. I’m talking about holy, life-altering, character-shaping side-effects — the kind that quietly change everything about you.
Let’s look at a few of them.

1. Faith Produces Courage
When Mark tells the story of Jairus, Jesus says something simple and direct: “Don’t be afraid. Just have faith.”
Faith and fear cannot dominate the same heart at the same time. One will push out the other.
When you truly trust God, you begin to take steps you would never take on your own:
- You obey when it’s inconvenient.
- You speak when it’s uncomfortable.
- You move forward when circumstances look impossible.
Faith doesn’t remove danger. It removes paralysis.
That’s a powerful side-effect.
2. Faith Produces Action
Real faith is never passive.
In Mark 2, a paralyzed man’s friends tear open a roof to get him to Jesus. That’s not polite belief. That’s determined faith.
Faith climbs.
Faith digs.
Faith tears through obstacles.
If your faith never costs you effort, it may only be agreement — not conviction.
One of the clearest side-effects of genuine faith is movement.
3. Faith Produces Peace
This may be one of the most beautiful side-effects.
In the storm on the Sea of Galilee, the disciples panic while Jesus sleeps. The storm didn’t wake Him because He trusted His Father.
Faith doesn’t mean storms stop. It means your soul steadies.
You can sit in a hospital waiting room with peace.
You can face financial uncertainty without losing your mind.
You can age without fear.
You can lead without panic.
Faith anchors you deeper than circumstances can shake you.
4. Faith Produces Perseverance
The woman with the issue of blood pressed through a crowd for one touch of Jesus’ garment. Twelve years of suffering didn’t extinguish her belief.
Faith stays.
Faith presses.
Faith refuses to quit.
One of the clearest side-effects of faith is endurance. You don’t collapse the moment something goes wrong. You endure because your trust isn’t built on outcomes — it’s built on God’s character.
5. Faith Produces Humility
This one surprises people.
Faith begins with admitting you cannot save yourself.
When Jesus says in Mark 2 that He came for sinners, not the self-righteous, He exposes something important: faith starts where pride ends.
Pride says, “I can handle this.”
Faith says, “I need You.”
Humility is not weakness. It’s clarity.
And it’s a side-effect of trusting God.
6. Faith Produces Bold Prayer
People who truly believe God acts… pray differently.
They ask specifically.
They ask persistently.
They ask expectantly.
Faith turns prayer from ritual into relationship.
It moves prayer from “just in case” to “because I know You hear me.”
7. Faith Produces Holiness
This may be the deepest side-effect of all.
When you trust God, you begin to care about what He cares about. You don’t pursue obedience to earn His love — you obey because you trust His goodness.
Faith reshapes your appetites.
Faith retrains your desires.
Faith changes what you tolerate.
Holiness is not behavior modification. It is the fruit of trust.
A Final Thought
Faith is not mental optimism.
It is not positive thinking.
It is not denial of reality.
Faith is confident trust in a faithful God.
And when that kind of trust takes root in your heart, you will notice the side-effects:
- Courage replacing fear
- Action replacing hesitation
- Peace replacing anxiety
- Perseverance replacing quitting
- Humility replacing pride
- Bold prayer replacing silence
- Holiness replacing compromise
If those side-effects aren’t growing in you, don’t panic.
Strengthen your faith by:
- Spending time in God’s Word
- Obeying quickly when He speaks
- Remembering what He has already done
- Surrounding yourself with believers who expect God to move
Faith grows when exercised.
And when it grows, it changes everything.
That’s the beautiful thing about faith.
You don’t just believe differently.
You live differently.