No one can sense his own weakness is at least a small temptation is not allowed to afflict either his body or his soul. Then, comparing his weakness to the help of God, a man comes to know its magnitude. But whoever does not know that he needs God's help, let him make many prayers. Insofar as he multiplies them, in that measure will he be humbled.
Isaac of NinevehSomeone who bears a grudge while he prays is like a person who sows in the sea and expects to reap a harvest.
Isaac of NinevehThe prayer of one who does not consider himself a sinner is not accepted by the Lord.
Isaac of NinevehGod requires not the doing of the commandments for their own sake, but the correction of the soul, for whose sake He established the commandments.
Isaac of Nineveh