Be thine own palace, or the world's thy jail.
Well done is better than well said.
To be a good loser is to learn how to win.
Always desire to learn something useful.
To know oneself, one should assert oneself.
If you've got a talent, protect it.
Without hard work, nothing grows but weeds.
What you do today can improve all your tomorrows.
Be kind whenever possible. It is always possible.
Know or listen to those who know.
That attitude does not exist so much today, but in those days there was a very sharp distinction between basic physics and applied physics. Columbia did not deal with applied physics.