Keep your heart with all diligence,
For out of it springs the issues of life. (NKJV)

Proverbs 4:23

Whoever has no rule over his own spirit
Is like a city broken down, without walls. (NKJV)

Proverbs 25:28

A fool vents all his feelings,
But a wise man holds them back. (NKJV)

Proverbs 29:11