Let 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 NinevehThe Lord bears all the weaknesses of men, but He does not bear a man who is always murmuring, and does not leave Him without chastisement.
Isaac of NinevehBehold, for years and generations, the way of God has been leveled by the cross and by death. How is this with thee, that thou seest the afflictions of the way as if they were out of the way? Doest not thou wish to follow the steps of the saints? Or doest thou wish to go a way which is especially for thee, without suffering? the way unto God is a daily cross. No one can ascend unto heaven with comfort, we know where the way of comfort leads.
Isaac of NinevehJust as a strongly flowing fountain is not blocked up by a handful of earth, so the compassion of the Creator is not overcome by the wickedness of his creatures.
Isaac of NinevehThe man who follows Christ in solitary mourning is greater than he who praises Christ amid the congregation of men.
Isaac of NinevehLove sinners, but hate their deeds, and do not disdain sinners for their failings, so that you yourself do not fall into the temptation in which they abide... Do not be angry at anyone and do not hate anyone, neither for their faith, nor for their shameful deeds... Do not foster hatred for the sinner, for we are all guilty... Hate his sins, and pray for him, so that you may be made like unto Christ, who had no dislike for sinners, but prayed for them.
Isaac of Nineveh