If you think you can do it, you can.
Without hard work, nothing grows but weeds.
Go for it now. The future is promised to no one.
Be gentle to all and stern with yourself.
Who seeks shall find.
Do not weep do not wax indignant. Understand.
Be thine own palace, or the world's thy jail.
If you can dream it, you can do it.
Be kind whenever possible. It is always possible.
Well done is better than well said.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.