Romans 2:16
on the day when God will judge the secrets of men's lives by Jesus Christ, as declared in the Good News as I have taught it.
1 Corinthians 4:5
Therefore form no premature judgements, but wait until the Lord returns. He will both bring to light the secrets of darkness and will openly disclose the motives that have been in people's hearts; and then the praise which each man deserves will come to him from God.
Hebrews 4:12-13
For God's Message is full of life and power, and is keener than the sharpest two-edged sword. It pierces even to the severance of soul from spirit, and penetrates between the joints and the marrow, and it can discern the secret thoughts and purposes of the heart.
Revelation 2:23
Her children too shall surely die; and all the Churches shall come to know that I am He who searches into men's inmost thoughts; and to each of you I will give a requital which shall be in accordance with what your conduct has been.