To deal with the stark reality of having hit or hurt a woman or child, to deal with the initial responsibility you have not to do that and the knowledge you did do it, can be incredibly hard.

I began the study of medicine, impelled by a desire for knowledge of facts and of man. The resolution to do disciplined work tied me to both laboratory and clinic for a long time to come.

Through the mythology of Einstein, the world blissfully regained the image of knowledge reduced to a formula.

I started playing ball when I was a kid. My dad was a pro ball player and he passed on his knowledge to me.

Every job leaves its residue, a bit of extra knowledge, a new skill-set.