"You are the average of the five people you spend the most time with."
"Without ambition one starts nothing. Without work one finishes nothing. The prize will not be sent to you. You have to win it."
"First say to yourself what you would be;and then do what you have to do."
"You don't have to be a hero to accomplish great things---to compete. You can just be an ordinary chap, sufficiently motivated to reach challenging goals."
"Although the world is full of suffering, it is full also of the overcoming of it."
"The only way of discovering the limits of the possible is to venture a little way past them into the impossible."
"Be silent and safe — silence never betrays you; Be true to your word and your work and your friend; Put least trust in him who is foremost to praise you,Nor judge of a road till it draw to the end."
"If everyone is moving forward together, then success takes care of itself."
"You can't learn in school what the world is going to do next year."
"Learn everything you can, anytime you can, from anyone you can, there will always come a time when you will be grateful you did."
"It is a profound and necessary truth that the deep things in science are not found because they are useful; they are found because it was possible to find them."
"When I face the desolate impossibility of writing five hundred pages, a sick sense of failure falls on me, and I know I can never do it. Then gradually, I write one page and then another. One day's work is all I can permit myself to contemplate."