Things do not happen. Things are made to happen.
Leap, and the net will appear.
Be gentle to all and stern with yourself.
If you've got a talent, protect it.
If you can dream it, you can do it.
Be thine own palace, or the world's thy jail.
By failing to prepare, you are preparing to fail.
What you do today can improve all your tomorrows.
Without hard work, nothing grows but weeds.
If you think you can do it, you can.
One of the things that ultimately led me to leave mathematics and go into political science was thinking I could prevent nuclear war.