If one is master of one thing and understands one thing well, one has at the same time, insight into and understanding of many things.
You do not examine legislation in the light of the benefits it will convey if properly administered, but in the light of the wrongs it would do and the harms it would cause if improperly administered.
That you may retain your self-respect, it is better to displease the people by doing what you know is right, than to temporarily please them by doing what you know is wrong.
Take Nothing but Pictures. Leave nothing but footprints. Kill nothing but time.
There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.
One man scorned and covered with scars still strove with his last ounce of courage to reach the unreachable stars; and the world will be better for this.
Seriousness is the only refuge of the shallow.
Happiness is as a butterfly which, when pursued, is always beyond our grasp, but which if you will sit down quietly, may alight upon you.