Psalm 37:18; the days of the upright
Psalm 94:11; the thoughts of man,
1 Corinthians 3:20; the thoughts of the wise
2 Timothy 2:19; them that are his.
2 Peter 2:9 how to deliver the godly
God knows much more than we know.
Aside from these things that the Lord knows, is what appears to be an oath in Joshua 22:22 "The LORD God of gods, the LORD God of gods, he knoweth, and Israel he shall know..." It is similar to the modern saying, "The lord knows my heart." But, the most beautiful reminder is Psalm 139:1, the whole Psalm. God knows us better than we know ourselves because He is ever with us, and always has been, from the "get-go."
The only question remaining is, do we know God?