"I hope I've lived a life of science whose style will encourage younger people"

"A leader is best when people barely know he exists, when his work is done, his aim fulfilled, they will say: we did it ourselves"

"Buildings should serve people, not the other way around"

"Borders? I have never seen one. But I have heard they exist in the minds of some people"

"Life is life - whether in a cat, or dog or man. There is no difference there between a cat or a man. The idea of difference is a human conception for man's own advantage"

"Plunge boldly into the thick of life, and seize it where you will, it is always interesting"

"Sarcasm: the last refuge of modest and chaste-souled people when the privacy of their soul is coarsely and intrusively invaded"

"People with many interests live, not only longest, but happiest"

"Cats and monkeys; monkeys and cats; all human life is there"

"Telling a teenager the facts of life is like giving a fish a bath"

"It is a useless life that is not consecrated to a great ideal. It is like a stone wasted on the field without becoming a part of any edifice"