Problems are not stop signs, they are guidelines.
Who seeks shall find.
Be kind whenever possible. It is always possible.
Things do not happen. Things are made to happen.
Leap, and the net will appear.
Do not weep do not wax indignant. Understand.
What you do today can improve all your tomorrows.
The wise does at once what the fool does at last.
Go for it now. The future is promised to no one.
If you can dream it, you can do it.
As for everything else, so for a mathematical theory: beauty can be perceived but not explained.