The secret of concentration is the secret of self-discovery. You reach inside yourself to discover your personal resources, and what it takes to match them to the challenge. ↗
I did study the art of being a barber because I wanted to figure out what my routine would be. Do you start in the front or back? Top or bottom? Swivel the chair or walk around? What I did discover is there's no such thing as the perfect haircut! ↗
We learn our virtues from our friends who love us; our faults from the enemy who hates us. We cannot easily discover our real character from a friend. He is a mirror, on which the warmth of our breath impedes the clearness of the reflection. ↗