Begin to be now what you will be hereafter.
I can, therefore I am.
Do not weep do not wax indignant. Understand.
You never know what motivates you.
Never complain and never explain.
The dog that trots about finds a bone.
If you think you can do it, you can.
The wise does at once what the fool does at last.
Be kind whenever possible. It is always possible.
It's always too early to quit.
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.