1 Corinthians 2:11
for who knows the thoughts of a man, but the spirit of man which is in him? even so the thoughts of God no one can know, but the spirit of God.
Romans 2:15
for they shew that the duties prescrib'd by the law, are written in their hearts, their consciences bearing witness to it, by their own reasonings alternately accusing and excusing them.
2 Corinthians 4:2-6
renouncing all secret dishonesty, and void of all artifice, I deliver the word of God unadulterated, and recommend my self by urging the truth home to every man's conscience, as in the presence of God.
Hebrews 4:12-13
for the word of God is active and efficacious, sharper than any two-edged sword, penetrating even to the division of soul and spirit, to the smallest and most inward parts, distinguishing the thoughts, and intentions of the heart.
1 John 3:19-21
Hereby we shall know that we are true professors, and set our consciences securely at rest.