"The secret sinner is worse than those who do evil openly; and so he receives a worse punishment."
--St. Mark the Ascetic
"Beloved, even if we should attain the very pinnacle of virtue, let us consider ourselves least of all, as we have learned that pride is able to cast down even from the heavens the person who does not take heed, and humility of mind is able to bring up on High from the very abyss of sin the person who knows how to be sober. For this is what placed the Publican before the Pharisee. By pride I mean an overwhelming boastful spirit, surpassing even incorporeal powers, that of the devil himself while humility of mind and acknowledgment of sins by the robber is what brought him into Paradise before the Apostles." --St. John Chrysostom
"The truly intelligent man pursues one sole objective: to obey and to conform to the God of all. With this single aim in view, he disciplines his soul, and whatever he may encounter in the course of his life, he gives thanks to God for the compass and depth of His providential ordering of all things. For it is absurd to be grateful to doctors who give us bitter and unpleasant medicines to cure our bodies, and yet to be ungrateful to God for what appears to us to be harsh, not grasping that all we encounter is for our benefit and in accordance with His providence. For knowledge of God and faith in Him is the salvation and perfection of the soul." --St. Anthony the Great
"We must keep in mind that whatever we do, openly or in secret, we do in the presence of our guardian angel." --St. Nikolai of Zicha
"It is not darkness and desolateness of place that give demons power against us, but barrenness of soul." --St. John Climacus
"I have found the words and the commandments of Christ pure, holy, true, splendid, brighter than the sun; and whoever believes in Christ and calls Him God and lives in accordance with His teaching, contained in the Holy Gospels, is fortunate and thrice-blessed." --St. Kosmas Aitolos