The human tendency to regard little things as important has produced very many great things.

If all mankind were suddenly to practice honesty, many thousands of people would be sure to starve.

Ask yourself always: how can this be done better?

There is no greater impediment to progress in the sciences than the desire to see it take place too quickly.

The book which most deserved to be banned would be a catalog of banned books.

The noble simplicity in the works of nature only too often originates in the noble shortsightedness of him who observes it.

Doubt everything at least once, even the sentence "Two times two is four."