Absolutely nothing upon this earth is hidden from God. God’s eyes are upon all humankind (Proverbs 15:3) (Zechariah 4:10); and in time there is nothing hidden that will not be revealed.
“God that planted the ear, shall he not hear? He that formed the eye, shall he not see?” (Psalm 94:9). “Can any hide himself in secret places that I shall not see him? Saith the LORD. Do not I fill heaven and earth? Saith the LORD” (Jeremiah 23:24).
“There is no darkness, nor shadow of death, where the workers of iniquity may hide themselves. For his eyes are upon the ways of man, and he seeth all his goings” (Job 34:21–22).
All that has been done in secret is already known by God. Jesus says: “For nothing is secret, that shall not be made manifest; neither any thing hid, that shall not be known and come abroad” (Luke 8:17).