St. John Climacus on Purified Heart - Orthodox (Psalm 51:10)

"The clean heart sees God—this is theosis. Through repentance, through the Jesus Prayer, through ascetic struggle, the heart is purified. 'Create' is ongoing: God continually cleanses those who continually repent. The ladder of divine ascent leads to a heart made pure." — St. John Climacus. Orthodox: theotic purification.