27 The spirit of man is the lamp of Jehovah, searching all the inward parts of the heart.
Proverbs 20:27 Cross References - LITV
Genesis 2:7
7 And Jehovah God formed the man out of dust from the ground, and blew into his nostrils the breath of life; and man became a living soul.
Job 32:8
8 But it is a spirit in man giving them perception, even the breath of the Almighty.
Proverbs 20:30
30 The stripes of a wound cleanse away evil, and strokes the inward parts of the heart.
Romans 2:15
15 who show the work of the law written in their hearts, their conscience witnessing with them, and the thoughts between one another accusing or even excusing,
1 Corinthians 2:11
11 For who among men knows the things of a man, except the spirit of a man within him? So also no one has known the things of God except the Spirit of God.
2 Corinthians 4:2-6
2 But we have renounced the hidden things of shame, not walking in craftiness, nor adulterating the word of God, but by the revelation of the truth commending ourselves to every conscience of men before God.
3 But also if our gospel is being hidden, it has been hidden in those being lost,
4 in whom the god of this age has blinded the thoughts of the unbelieving, so that the brightness of the gospel of the glory of Christ, who is the image of God, should not dawn on them.
5 For we do not proclaim ourselves, but Christ Jesus as Lord, and ourselves your slaves for the sake of Jesus.
6 Because it is God who said, "Out of darkness Light shall shine," who shone in our hearts to give the brightness of the knowledge of the glory of God in the face of Jesus Christ. Isa. 42:6, 7, 16
Hebrews 4:12-13
12 For the word of God is living, and powerfully working, and sharper than every two-edged sword, and piercing as far as the division of both soul and spirit, of both joints and marrow, and able to judge of the thoughts and intentions of the heart;
13 and there is no creature unrevealed before Him; but all things are naked and laid open to His eyes, with whom is our account.