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

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

I like to take pictures of lots of things: people-such as my nephews, my dogs, and just interesting objects that I see. For instance, I might take a picture of flowers by the side of the road, an old sign or a fence.

I think women are natural caretakers. They take care of everybody. They take care of their husbands and their kids and their dogs, and don't spend a lot of time just getting back and taking time out.

I am elected by the people of Bucharest, not the dogs.

My feet are dogs.

The only creatures that are evolved enough to convey pure love are dogs and infants.

Happens to everybody. Horses, dogs, men. Nobody gets out of life alive.

I'm looking more like my dogs every day - it must be the shaggy fringe and the ears.

Of the seven experiments, the ones that have been most investigated so far have been the pets. The dogs who know when their masters for coming home, and the sense of being stared at.

People who keep dogs are cowards who haven't got the guts to bite people themselves.

I've got nine kids, nine dogs, three grandkids - and one in the oven. And three parrots!

Flatterers look like friends, as wolves like dogs.

In the fifties I had dreams about touching a naked woman and she would turn to bronze or the dream about hot dogs chasing donuts through the Lincoln Tunnel.

That they may have a little peace, even the best dogs are compelled to snarl occasionally.

Dogs are very, very pleasant with people that they're connected to.

I like to be at home because I just travel so much. I have four dogs, golden retrievers.

There are writers in Germany who drink the Absolute like water; and there are books in which even the dogs make references to the Infinite.

Feed the dogs. I hate to hear them barking like that.

It seems like all the good looking people have smaller dogs these days. Especially for the women, because they always come in with their little Chihuahuas and the guys come in with their Golden Retrievers.

I hope my tongue in prune juice smothers, If I belittle dogs and mothers.

Dogs got personality. Personality goes a long way.