Go for it now. The future is promised to no one.
Without hard work, nothing grows but weeds.
Know or listen to those who know.
If you've got a talent, protect it.
It's always too early to quit.
If you can dream it, you can do it.
Never complain and never explain.
The dog that trots about finds a bone.
To be a good loser is to learn how to win.
Quality is not an act, it is a habit.
All the mathematical sciences are founded on relations between physical laws and laws of numbers, so that the aim of exact science is to reduce the problems of nature to the determination of quantities by operations with numbers.