1 Corinthians 2:11
For who among men knoweth the things of man, save the spirit of man which is in him? so also the things of God knoweth no man, but the Spirit of God.
Romans 2:15
which exhibit the practice of the law written on their hearts, their conscience also bearing its testimony, and their mutual reasonings at intervals bringing accusations or forming excuses;)
2 Corinthians 4:2-6
but have renounced all shameful secret practices, not conducting ourselves with artifice, nor deceitfully disguising the word of God, but by clear manifestation of the truth, commending ourselves to every man's conscience as in the presence of God.
Hebrews 4:12-13
For the word of God is quickening, and energetic, and sharper than every two-edged sword, and piercing through and through, so as to divide both soul and spirit, both joints and spinal marrow, and critically judges the thoughts and intents of the heart.
1 John 3:19-21
and hereby we know that we are of the truth, and in his presence have this persuasion in our hearts.