“If a man does not put himself in the attitude of a sinner, his prayer will not be heard before God.” A brother said to him, “What is a sinful soul?” And the elder said, “Every one who bears his own sins, and does not consider those of his companion.”
[Abba Moses the Strong, Apophthegmata Patrum]
Do not be surprised that you fall every day; do not give up, but stand your ground courageously. And assuredly the angel who guards you will honour your patience. While a wound is still fresh and warm it is easy to heal, but old, neglected and festering ones are hard to cure, and require for their care much treatment, cutting, plastering and cauterization. Many from long neglect become incurable. But with God all things are possible (Matthew 19:26).
[John of the Ladder, The Ladder of Divine Ascent]