St. John Climacus ca. 7th century
Some of the dying would answer: “Blessed be God Who has not turned away my prayer nor His mercy from me.” (Ps. 62:50) Others would say, “Blessed be the Lord God Who has not given us a prey for their teeth.” (Ps. 123:6) But others would be sad and say: “Will our souls pass through the impassable water of the spirits of the air?” (cf. Ps. 123:5) These would be unsure, and worried about the rendering of accounts after death. (Ladder of Divine Ascent, Step 5)