"You never change things by fighting the existing reality. To change something, build a new model that makes the existing model obsolete."

"A life of leisure and a life of laziness are two things. There will be sleeping enough in the grave."

"Holding on to anger is like drinking poison and expecting the others person to die."

"Experience is a hard teacher because she gives the test first, the lesson afterwards."

"There are many ways of going forward, but only one way of standing still. "