If God already knows everything about us, why does He test us?

That question comes up when we read passages such as Genesis 22, where God tested Abraham by telling him to offer Isaac. After Abraham showed that he was willing to obey, the angel of the Lord said:

“Now I know that you fear God, since you have not withheld your son, your only son, from Me.” Genesis 22:12

At first glance, that can sound as though God needed the test to discover what Abraham would do. But Scripture makes it clear that God already knows the heart.

David told Solomon:

“For the LORD searches all hearts, and understands every intent of the thoughts.” 1 Chronicles 28:9

Psalm 139 says that God knows our thoughts before we speak and knows our words before they are even on our tongue. Jesus knew what was in people without anyone having to tell Him.

So God does not test us because He is lacking information.

He tests us because we often do not know our own hearts nearly as well as we think we do.

It is easy to say, “I trust God,” when trusting Him costs us nothing. It is easy to say, “God comes first,” when nothing we treasure is being challenged. It is easy to say we will obey God until obedience becomes painful.

A test brings what is inside us into the open.

Israel learned this in the wilderness. Moses told them:

“You shall remember all the way which the LORD your God has led you in the wilderness these forty years, that He might humble you, testing you, to know what was in your heart, whether you would keep His commandments or not.” Deuteronomy 8:2

God knew what was in their hearts. The Israelites needed to see it.

When they became hungry, thirsty, tired, or afraid, things began coming out of them that had been hidden while life was easier. They complained. They doubted God. They looked backward toward Egypt. At times they even wanted to return to the slavery from which God had delivered them.

The wilderness did not create those things in their hearts. It exposed them.

Our trials often do the same thing.

We may discover impatience we did not know was there. We may discover how much we depend upon money, health, comfort, approval, or control. We may discover that our faith is stronger than we thought. We may also discover places where our faith still needs to grow.

A test can show us the truth about ourselves.

There is also an important difference between testing and tempting.

James wrote:

“Let no one say when he is tempted, ‘I am being tempted by God’; for God cannot be tempted by evil, and He Himself does not tempt anyone.” James 1:13

God never tries to entice us into sin.

Satan tempts in order to make us fall. Our own sinful desires can tempt us. But God tests us for an entirely different purpose.

A temptation says, “Disobey God.”

A test asks, “Will you trust God enough to obey Him?”

Sometimes the same circumstance can involve both. Satan may want to use trouble to pull us away from God, while God allows that trouble to strengthen our faith and teach us to depend upon Him.

James tells believers:

“Consider it all joy, my brothers and sisters, when you encounter various trials, knowing that the testing of your faith produces endurance.” James 1:2–3

Notice what is being tested. Our faith.

Untested faith can make great claims. Tested faith has been through something.

Abraham said he trusted God. On Mount Moriah, that trust became visible through obedience. God did not learn something He had never known. Abraham’s faith was brought into action.

That is often what God’s testing does in our lives.

It takes what we say we believe and puts it where it must be lived.

We say God will provide. Then money becomes tight.

We say God is enough. Then something important is taken from us.

We say we trust His wisdom. Then He allows something we do not understand.

We say we will obey His Word. Then His Word tells us to do something difficult.

That is where faith stops being merely something we talk about.

Peter compared tested faith to gold that is refined by fire:

“So that the proof of your faith, being more precious than gold which perishes though tested by fire, may be found to result in praise, glory, and honor at the revelation of Jesus Christ.” 1 Peter 1:7

Fire does not make gold valuable. It reveals and purifies what is there.

In much the same way, trials expose our faith and strengthen it.

That does not mean every difficulty in life is a special test sent directly from God. We live in a fallen world. Sometimes trouble comes because of our own choices. Sometimes it comes because of the actions of others. Sometimes there is no explanation given to us at all.

But God can use every circumstance in the life of His child.

When He allows our faith to be tested, the question is not whether God knows what is in our heart.

He does.

The question may be whether we know what is there.

God already knew Abraham.

The test showed Abraham’s faith through obedience.

God already knew Israel.

The wilderness exposed what was in them.

And God already knows us.

Sometimes He allows the test because there are things about our faith that can only be learned when trusting Him becomes difficult.

We may not enjoy the test.

We may not understand the test.

But when the test comes, we can ask a better question than, “Why is God doing this to me?”

We can ask:

“Lord, what are You showing me about my heart, and will I trust You enough to obey?”