The competition between human beings destroys with cold and diabolic brutality... Under the pressure of this competitive fury we have not only forgotten what is useful to humanity as a whole, but even that which is good and advantageous to the individual. [...] One asks, which is more damaging to modern humanity: the thirst for money or consuming haste... in either case, fear plays a very important role: the fear of being overtaken by one's competitors, the fear of becoming poor, the fear of making wrong decisions or the fear of not being up to snuff...

The fidelity of a dog is a precious gift.

More than any other product of human scientific culture scientific knowledge is the collective property of all mankind.

Philosophers are people who know less and less about more and more, until they know nothing about everything. Scientists are people who know more and more about less and less, until they know everything about nothing.

Truth in science can be defined as the working hypothesis best suited to open the way to the next better one.

The bond with a dog is as lasting as the ties of this earth can ever be.

Man appears to be the missing link between anthropoid apes and human beings.