In the church you shall acknowledge your transgressions, and you shall not come near for your prayer with an evil conscience. This is the way of life. . . . But every Lord’s day gather yourselves together and break bread and give thanksgiving after having confessed your transgressions, that your sacrifice may be pure. – Didache 4, 14 (50 A.D).

The Marvelous Power Of The Cross | Pope Leo The Great
Our understanding, which is enlightened by the Spirit of truth, should receive with purity and freedom of heart the glory of the cross as it shines in heaven and on earth. It should see with inner vision the meaning of the Lord's words when he spoke of the imminence...