If you think you can do it, you can.
The most effective way to do it, is to do it.
You never know what motivates you.
Either you run the day or the day runs you.
If you're going through hell, keep going.
Begin to be now what you will be hereafter.
After a storm comes a calm.
To be a good loser is to learn how to win.
To know oneself, one should assert oneself.
Expect problems and eat them for breakfast.
Crabbed and obscure definitions are of no use beyond a narrow circle of students, of whom probably every one has a pet one of his own.