Abba Isaiah of Scetis: Not judging one's neighbor

Not judging one's neighbor is a protection for those who struggle in knowledge, but blaming one's neighbor destroys this protection in ignorance. Taking care of one's tongue¹ is the sign a person who practices the virtues. Not controlling one's tongue shows that a person has no inner virtue. Goodness gives rise to purity. Distraction give rise to passions, and hardheartedness gives rise to anger. Discipline of the soul is hatred of distraction, and disciple of the body is poverty. The fall of the soul is loving distraction, and its rise is silence in knowledge. Excessive sleep disturbs the passions within the body, and vigil in measure is the heart's salvation. Too much sleep thickens the heart, but vigil in measure refines it. It is better to sleep in silence and knowledge, than to keep vigil with idle talk. Compunction calmly expels all evil. Not offending your neighbor's conscience gives rise to humility. Human glory very gradually gives rise to pride. Loving to boast expels knowledge.
+Abba Isaiah of Scetis, from Ascetic Discourses, Discourse 16 On the Joy that Comes to the Soul that Desires to Serve God.

¹ St. John Climacus, from The Ladder, Step 22