Perspective

"That is the highest and most profitable lesson, when a man truly knoweth and judgeth lowly of himself. To account nothing of one's self, and to think always kindly and highly of others, this is great and perfect wisdom. Even shouldest thou see thy neighbor sin openly or grievously, yet thou oughtest not to reckon thyself better than he, for thou knowest not how long thou shalt keep thine integrity. All of us are weak and frail; hold thou no man more frail than thyself."

--from The Imitation of Christ by Thomas a Kempis