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

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.

Historians will have to face the fact that natural selection determined the evolution of cultures in the same manner as it did that of species.

Every man gets a narrower and narrower field of knowledge in which he must be an expert in order to compete with other people. The specialist knows more and more about less and less and finally knows everything about nothing.

I have found the missing link between the higher ape and civilized man; it is we.

We do not take humor seriously enough.

Evil, by definition, is that which endangers the good, and the good is what we perceive as a value.

We had better dispense with the personification of evil, because it leads, all too easily, to the most dangerous kind of war: religious war.

Most of the vices and mortal sins condemned today correspond to inclinations that were purely adaptive or at least harmless in primitive man.

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

I believe that present day civilized man suffers from insufficient discharge of his aggressive drive.

Barking dogs occasionally bite, but laughing men hardly ever shoot.

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

'I don't need brains,' says the billionaire contemptuously. 'I'm brainy enough myself!' The broker cries out in desperation, 'What, in heaven's name, do you want?' 'Goodness,' is the answer.

Ethologists are often accused of drawing false analogies between animal and human behaviour. However, no such thing as a false analogy exists: an analogy can be more or less detailed and, hence, more or less informative.

From a neighbour, I got a one-day-old duckling and found, to my intense joy, that it transferred its following response to my person. At the same time, my interest became irreversibly fixated on water fowl, and I became an expert on their behaviour even as a child.

I consider early childhood events as most essential to a man's scientific and philosophical development.

I grew up in the large house and the larger garden of my parents in Altenberg. They were supremely tolerant of my inordinate love for animals.

I owe undying gratitude to my patient parents.

In the course of evolution, it constantly happens that, independently of each other, two different forms of life take similar, parallel paths in adapting themselves to the same external circumstances.

Practically all animals which move fast in a homogeneous medium have found means of giving their body a streamlined shape, thereby reducing friction to a minimum.

The father-mother family with two children isolated in a city flat is already insufficient.

There is indeed the possibility that the evolutionary process has, in gray antiquity, bred into us an excess of aggression.

When I was about ten, I discovered evolution by reading a book by Wilhelm Boelsche and seeing a picture of Archaeopteryx.

Whenever we find, in two forms of life that are unrelated to each other, a similarity of form or of behaviour patterns which relates to more than a few minor details, we assume it to be caused by parallel adaptation to the same life-preserving function.

The human mind in taking us down the path of technocracy has become the adversary of life itself and collaterally the adversary of the human soul.

Man has been driven out of the paradise in which he could trust his instincts.

The cat is a wild animal that inhabits the homes of humans.

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

The French are the wittiest, the most charming, and up to the present, at all events, the least musical race on Earth.

My life has been a continuous fulfillment of dreams. It appears that everything I saw and did has a new, and perhaps, more significant meaning, every time I see it. The earth is good. It is a privilege to live thereon.

I believe as human beings we are out of balance, out of synch with the earth.

We are put on this earth to have a good time. This makes other people feel good. And the cycle continues.

All men are by nature equal, made all of the same earth by one Workman; and however we deceive ourselves, as dear unto God is the poor peasant as the mighty prince.

Infuse your life with action. Don't wait for it to happen. Make it happen. Make your own future. Make your own hope. Make your own love. And whatever your beliefs, honor your creator, not by passively waiting for grace to come down from upon high, but by doing what you can to make grace happen... yourself, right now, right down here on Earth.

You know, if you hang around this earth long enough you really see how things come full circle.

With a firm and steadfast mind one should hold under all conditions, that everywhere the earth is below and the sky above, and to the energetic man, every region is his fatherland.

A time will come when men will stretch out their eyes. They should see planets like our Earth.

When I say artist I mean the man who is building things - creating molding the earth - whether it be the plains of the west - or the iron ore of Penn. It's all a big game of construction - some with a brush - some with a shovel - some choose a pen.

Long after this wonderful event in the Earth's history, when the human species was spread over a good deal of Asia, Europe, and Africa, migration to the American continents began in attempts to find new feeding grounds and unoccupied areas for hunting and fishing.

My object will be, first, to show by what connections the history of the fossil bones of land animals is linked to the theory of the earth and why they have a particular importance in this respect.

I just did a picture book called The Wildest Brother on Earth, and you will find both of my children in there.

A good businessman never makes a contract unless he's sure he can carry it through, yet every fool on earth is perfectly willing to sign a marriage contract without considering whether he can live up to it or not.

Government of the people, by the people, for the people, shall not perish from the Earth.

Pick a flower on Earth and you move the farthest star.

I have continued systematically to study the Book of Mormon and Bible to understand even more deeply what God expects of me and my family while on this earth.

Man is a microcosm, or a little world, because he is an extract from all the stars and planets of the whole firmament, from the earth and the elements; and so he is their quintessence.

You think that a wall as solid as the earth separates civilization from barbarism. I tell you the division is a thread, a sheet of glass. A touch here, a push there, and you bring back the reign of Saturn.

For once you have tasted flight you will walk the earth with your eyes turned skywards, for there you have been and there you will long to return.