Direct your zeal, therefore, first upon yourself; then you may with justice exercise it upon those about you. You are well versed in coloring your own actions with excuses which you will not accept from others, though it would be more just to accuse yourself and excuse your brother. If you wish men to bear with you, you must bear with them. Behold, how far you are from true charity and humility which does not know how to be angry with anyone, or to be indignant save only against self!
…Some people live at peace with themselves and with their fellow men, but others are never at peace with themselves nor do they bring it to anyone else. These latter are a burden to everyone, but they are more of a burden to themselves. A few, finally, live at peace with themselves and try to restore it to others.
Now, all our peace in this miserable life is found in humbly enduring suffering rather than in being free from it. He who knows best how to suffer will enjoy the greater peace, because he is the conqueror of himself, the master of the world, a friend of Christ, and an heir of heaven.
- Thomas a Kempis, II:3