Vladimir Ilyich [Lenin], your concrete actions are completely unworthy of the ideas you pretend to hold.

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

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

I have no friends. The more you learn about the dignity of the gorilla, the more you want to avoid people.

As long as the human race is able to concern itself with more than mere survival, soccer will have its place.

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

Scientific truth is universal, because it is only discovered by the human brain and not made by it, as art is.

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

Lenin is not comparable to any revolutionary figure in history. Revolutionaries have had ideals. Lenin has none.

The law has no claim to human respect. It has no civilizing mission; its only purpose is to protect exploitation.

No matter how old we become, we can still call them 'Holy Mother' and 'Father' and put a child-like trust in them.

In science, new ideas are at first completely neglected, later fiercely attacked, and finally regarded as well known.

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

When you realize the value of all life, you dwell on what is past and concentrate more on the preservation of the future.

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

Sociability is as much a law of nature as mutual struggle. Mutual aid is as much a law of animal life as mutual struggle.

I had this great urge... I had it the day I was born. Some may call it destiny. My parents and friends called it dismaying.

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

You reason like the king, who, being sent across the frontier, called out, 'What will become of my poor subjects without me?'

When you realize the value of all life, you dwell less on what is past and concentrate more on the preservation of the future.

I feel more comfortable with gorillas than people. I can anticipate what a gorilla's going to do, and they're purely motivated.

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

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

The future cannot be legislated. All that can be done is to anticipate its most important movements and to clear the path for them.

For captive gorillas, trees should be available to climb and material such as straw, branches, or bamboo supplied for nest building.

He objected, though, to indiscriminate reading. 'One must have some question,' he wrote, 'addressed to the book one is going to read.

It ought to be realized by all dog owners that obesity shortens a dog's life quite considerably, a life which is much too short anyhow.

Think about the world you want to live and work in. What do you need to know to build the world? Demand that your teachers teach you that.

When we have but the will to do it, that very moment will Justice be done: that very instant the tyrants of the Earth shall bite the dust.

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

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

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.

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.

In nature we find not only that which is expedient, but also everything which is not so inexpedient as to endanger the existence of the species.

There is nothing biologically unusual about a homosexual act of pseudocopulation. Many species indulge in this, under a variety of circumstances.

Gorillas are the largest of the great apes. A mature male may be six feet tall and weigh 400 pounds or more; his enormous arms can span eight feet.

Gorillas are almost altruistic in nature. There's very little if any 'me-itis.' When I get back to civilization I'm always appalled by 'me, me, me.'

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.

Gorillas are almost altruistic in nature. There's very little if any 'me-itis.' When I get back to civilization, I'm always appalled by 'me, me, me.'

Struggle so that all may live this rich, overflowing life. And be sure that in this struggle you will find a joy greater than anything else can give.

There was no way that I could explain to dogs, friends, or parents my compelling need to return to Africa to launch a long-term study of the gorillas.

The neuro-physiological organization which we call instinct functions in a blindly mechanical way, particularly apparent when its function goes wrong.

The response of teenagers to their idols is relevant. As an audience, they enjoy themselves, not by screaming with laughter, but screaming with screams.

One could not be a successful scientist without realizing that, a goodly number of scientists are not only narrow-minded and dull, but also just stupid.

Educated men - "civilized," as Fourier used to say with disdain - tremble at the idea that society might some day be without judges, police, or gaolers.

You know how I always believe in the future. Without disorder, the revolution is impossible; knowing that, I did not lose hope, and I do not lose it now.

I think like the species I am studying, whatever it is. If I am watching a lizard, I become the lizard. Gazing ath the water at a pike, I become the pike.

In existing States a fresh law is looked upon as a remedy for evil. Instead of themselves altering what is bad, people begin by demanding a law to alter it.

This unusual and highly successful species spends a great deal of time examining his higher motives and an equal amount of time ignoring his fundamental ones.

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