So act that your principle of action might safely be made a law for the whole world.
The meeting of two personalities is like the contact of two chemical substances: if there is any reaction, both are transformed.
I have often wished I had time to cultivate modesty... But I am too busy thinking about myself.
There are sadistic scientists who hurry to hunt down errors instead of establishing the truth.
I phoned my dad to tell him I had stopped smoking. He called me a quitter.
Nothing is particularly hard if you divide it into small jobs.
Because we don't think about future generations, they will never forget us.