Never complain and never explain.
The dog that trots about finds a bone.
If you've got a talent, protect it.
Things do not happen. Things are made to happen.
The wise does at once what the fool does at last.
If you're going through hell, keep going.
Quality is not an act, it is a habit.
Wherever you are - be all there.
If you think you can do it, you can.
Who seeks shall find.
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.