Even if we have thousands of acts of great virtue to our credit, our confidence in being heard must be based on God's mercy and His love for men. Even if we stand at the very summit of virtue, it is by mercy that we shall be saved.
St. John Chrysostom
When anyone is disturbed or saddened under the pretext of a good and soul-profiting matter, and is angered against his neighbour, it is evident that this is not according to God: for everything that is of God is peaceful and useful and leads a man to humility and to judging himself.