1 Corinthians 2:11
For who of men knows the things of man, except the spirit of the man which is in him? so indeed no one knows the things of God, except the Spirit of God.
Romans 2:15
who show the work of the law written in their hearts, their conscience witnessing, and their thoughts accusing or indeed excusing with one another,
2 Corinthians 4:2-6
but we lay aside the hidden things of disgrace, not walking in craftiness, nor handling the word of God deceitfully, but in the manifestation of the truth commending ourselves to every conscience of men, before God.
Hebrews 4:12-13
For the word of God is living, and powerful, and sharper than any two-edged sword, and piercing unto the dividing of soul and spirit, of both joints and marrow, and a quick discerner of the thoughts and intents of the heart.
1 John 3:19-21
And in this we shall know that we are of the truth, and we shall assure our hearts before him;