Things do not happen. Things are made to happen.
It's always too early to quit.
If you think you can do it, you can.
Do not weep do not wax indignant. Understand.
To be a good loser is to learn how to win.
By failing to prepare, you are preparing to fail.
If you've got a talent, protect it.
The dog that trots about finds a bone.
Problems are not stop signs, they are guidelines.
Quality is not an act, it is a habit.
I can only point out a curious fact. Year after year the Nobel Awards bring a moment of happiness not only to the recipients, not only to colleagues and friends of the recipients, but even to strangers.