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

All scientific knowledge to which man owes his role as master of the world arose from playful activities.

Hatred of humanity and love of animals make a very bad combination.

The fidelity of a dog is a precious gift demanding no less binding moral responsibilities than the friendship of a human being.

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

The truth about an animal is far more exciting and altogether more beautiful than all the myths woven about it.

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.