I can, therefore I am.
If you think you can do it, you can.
By failing to prepare, you are preparing to fail.
Who seeks shall find.
Never complain and never explain.
Begin to be now what you will be hereafter.
If you're going through hell, keep going.
Be thine own palace, or the world's thy jail.
Be kind whenever possible. It is always possible.
Be gentle to all and stern with yourself.
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.