19 Like water reflects a face, so a man’s heart reflects the man.
Proverbs 27:19 Cross References - WEB
Genesis 6:5
5 Yahweh saw that the wickedness of man was great in the earth, and that every imagination of the thoughts of man’s heart was continually only evil.
Psalms 33:15
15 he who fashions all of their hearts; and he considers all of their works.
Mark 7:21
21 For from within, out of the hearts of men, proceed evil thoughts, adulteries, sexual sins, murders, thefts,
James 1:22-25
22 But be doers of the word, and not only hearers, deluding your own selves.
23 For if anyone is a hearer of the word and not a doer, he is like a man looking at his natural face in a mirror;
24 for he sees himself, and goes away, and immediately forgets what kind of man he was.
25 But he who looks into the perfect law of freedom and continues, not being a hearer who forgets, but a doer of the work, this man will be blessed in what he does.