Psalm 44:21

Israel's Complaint

²⁰
If we had forgotten the name of our God
Or stretched out our hands to a strange god,
²¹ 
Would not God discover this?
For He knows the secrets of the heart.
²²
But for Your sake we are killed all the day long;
We are considered as sheep to be slaughtered.

Secrets of the Heart

Jeremiah 17:10

“I, the Lord, search and examine the mind,
I test the heart,
To give to each man according to his ways,
According to the results of his deeds.

Job 31:4

“Does not God see my ways
And count all my steps?

Job 31:14

What then could I do when God arises [to judge me]?
When He calls me to account, what will I answer Him?

Job 34:21-22

“For God’s eyes are on the ways of a man,
And He sees all his steps.

Joshua 22:22-23

“The Mighty One, God, the Lord, the Mighty One, God, the Lord! He knows, and may Israel itself know. If it was in rebellion, or if in an unfaithful act against the Lord, do not save us this day!

Psalm 139:1-24

O Lord, you have searched me [thoroughly] and have known me.

Ecclesiastes 12:14

For God will bring every act to judgment, every hidden and secret thing, whether it is good or evil.

Jeremiah 23:24

“Can anyone hide himself in secret places
So that I cannot see him?” says the Lord.
“Do I not fill heaven and earth?” says the Lord.

Romans 2:16

on that day when, as my gospel proclaims, God will judge the secrets [all the hidden thoughts and concealed sins] of men through Christ Jesus.

1 Corinthians 4:5

So do not go on passing judgment before the appointed time, but wait until the Lord comes, for He will both bring to light the [secret] things that are hidden in darkness and disclose the motives of the hearts. Then each one’s praise will come from God.

Hebrews 4:12-13

For the word of God is living and active and full of power [making it operative, energizing, and effective]. It is sharper than any two-edged sword, penetrating as far as the division of the soul and spirit [the completeness of a person], and of both joints and marrow [the deepest parts of our nature], exposing and judging the very thoughts and intentions of the heart.

Revelation 2:23

And I will kill her children (followers) with pestilence [thoroughly annihilating them], and all the churches will know [without any doubt] that I am He who searches the minds and hearts [the innermost thoughts, purposes]; and I will give to each one of you [a reward or punishment] according to your deeds.