Keep your heart with all diligence; for out of it are the issues of life.
All Commentaries on Proverbs 4:23 Go To Proverbs 4
Athanasius the Apostolic
AD 373
Living thus, let us watch constantly and, as it is written, keep our heart with all watchfulness, for we have terrible and crafty enemies, the wicked demons, and we wrestle against them, as the apostle said: “For our wrestling is not against flesh and blood, but against the principalities and the powers, against the world rulers of this darkness, against spiritual forces of wickedness on high.” Life of St.