You can't do anything about the length of your life, but you can do something about its width and depth.

Per ogni problema complesso vi è una soluzione semplice. Ed è sempre sbagliata

I go on working for the same reason that a hen goes on laying eggs.

We are here and it is now. Further than that, all human knowledge is moonshine.

The older I grow the more I distrust the familiar doctrine that age brings wisdom.

Those who can -- do. Those who can't -- teach.

I believe that it is better to tell the truth than a lie. I believe it is better to be free than to be a slave. And I believe it is better to know than to be ignorant.