1 Corinthians 2:11
For what man can understand his own inner thoughts except by his own spirit within him? Just so no one but the Spirit of God can understand the thoughts of God.
Romans 2:15
for they show that the deeds the law demands are written on their hearts, because their consciences will testify for them, and their inner thoughts will either accuse or defend them,
2 Corinthians 4:2-6
On the other hand, I have renounced all underhanded, disgraceful methods; I neither practice cunning nor do I tamper with God's message, but by clear and candid statements of truth I try to commend myself to every human conscience in God's sight.
Hebrews 4:12-13
For God's message is alive and full of power in action, sharper than any double-edged sword, piercing even to the depths of soul and spirit, to the dividing of joints and marrow, and passing judgment on the thoughts and purposes of the heart.
1 John 3:19-21
In this way we shall know by experience that we are on the side of the truth, and satisfy our consciences in God's sight,