Humility collects the soul into a single point by the power of silence. A truly humble man has no desire to be known or admired by others, but wishes to plunge from himself into himself, to become nothing, as if he had never been born. When he is completely hidden to himself in himself, he is completely with God
Isaac of NinevehThe man who follows Christ in solitary mourning is greater than he who praises Christ amid the congregation of men.
Isaac of NinevehIf, at the time when the mind is praying it is distracted by any extraneous thought or worry about anything, then this prayer is not called pure.
Isaac of NinevehLet there always be a preponderance of mercy with you, even though you don't feel such mercy in yourself, as God has for the world ... A cruel and merciless heart is never purified. A merciful man is the doctor of his own soul, because as it were a by a strong wind from is heart he drives out the darkness of the passions.
Isaac of Nineveh