You never know what motivates you.
Be gentle to all and stern with yourself.
It's always too early to quit.
Never complain and never explain.
Go for it now. The future is promised to no one.
What you do today can improve all your tomorrows.
Leap, and the net will appear.
The secret of getting ahead is getting started.
After a storm comes a calm.
Know or listen to those who know.
Many who have had an opportunity of knowing any more about mathematics confuse it with arithmetic, and consider it an arid science. In reality, however, it is a science which requires a great amount of imagination.