1. “If anyone does not recognize himself as a sinner, his prayer is not acceptable to God.”
2. “If a man does not argue with the thoughts that the enemy secretly sows in us, but by prayer to God uproots conversation with them, this is a sign that his mind has attained wisdom, and that he has found a short path.”
(St. Isaac the Syrian, Homilies, 30)
3. “A humble man is never rash, hasty or perturbed, never has any hot and volatile thoughts, but at all times remains calm. Even if heaven were to fall and cleave to the earth, the humble man would not be dismayed. Not every quiet man is humble, but every humble man is quiet. There is no humble man who is not self-constrained; but you will find many who are self-constrained without being humble. This is also what the meek humble Lord meant when He said, ‘Learn of Me, for I am meek and humble of heart, and ye shall find rest unto your souls.’ [Matt 11:29] For the humble man is always at rest, because there is nothing which can agitate or shake his mind. Just as no one can frighten a mountain, so the mind of a humble man cannot be frightened. If it be permissible and not incongruous, I should say that the humble man is not of this world. For he is not troubled and altered by sorrows, nor amazed and enthused by joys, but all his gladness and his real rejoicing are in the things of his Master. Humility is accompanied by modesty and self-collectedness: that is, chastity of the senses; a moderate voice; mean speech; self-belittlement; poor raiment; a gait that is not pompous; a gaze directed towards the earth; superabundant mercy; easily flowing tears; a solitary soul; a contrite heart; imperturbability to anger; undistributed senses; few possessions; moderation in every need; endurance; patience; fearlessness; manliness of heart born of a hatred of this temporal life; patient endurance of trials; deliberations that are ponderous, not light, extinction of thoughts; guarding of the mysteries of chastity; modesty, reverence; and above all, continually to be still and always to claim ignorance.”
(Ascetical Homilies of St Isaac the Syrian “Homily 72: On the Vision of the Nature of Incorporeal Beings, in Questions and Answers”)
4. Draw nigh to the righteous, and through them you will draw nigh to God. Communicate with those who possess humility, and you will learn morals from them. A man who follows one who loves God becomes rich in the mysteries of God; but he who follows an unrighteous and proud man gets far away from God, and will be hated by his friends.
5. When you want to direct someone toward the good, first put him at peace bodily and honor him with words of love. For nothing inclines such a man to shame and induces him to cast of his vice and be changed for the better as do bodily goods and honor, which he sees in you. Then, with love tell him a word or two, and do not be inflamed with anger toward him. Do not let him see any cause of enmity toward you. For love does not know how to lose its temper.