Physical bravery is an animal instinct; moral bravery is much higher and truer courage.
Wendell Phillips

Physiology is the science which treats of the properties of organic bodies, animal and vegetable, of the phenomena they present, and of the laws which govern their actions. Inorganic substances are the objects of other sciences, - physics and chemistry.
Johannes P. Muller

Poetry is the journal of the sea animal living on land, wanting to fly in the air. Poetry is a search for syllables to shoot at the barriers of the unknown and the unknowable. Poetry is a phantom script telling how rainbows are made and why they go away.
Carl Sandburg

Principally I hate and detest that animal called man; although I heartily love John, Peter, Thomas, and so forth.
Jonathan Swift

Religion is the masterpiece of the art of animal training, for it trains people as to how they shall think.
Arthur Schopenhauer

Science is the international language, so when we are able to convince countries that good decision-making for human health and animal health is based upon science, that's a real success story for us.
Mike Johanns

Self-interest is but the survival of the animal in us. Humanity only begins for man with self-surrender.
Henri Frederic Amiel

Shoot, every time you get on an animal, you take your life in your hands.
Chris LeDoux

So the animal finally performs in that situation only the fitting act.
Edward Thorndike

Some of the snowballs have a kind of animal energy. Not just because of the materials inside them, but in the way that they appear caged, captured.
Andy Goldsworthy

Some of you think an Indian is like a wild animal. This is a great mistake.
Chief Joseph

Some statements concern the conscious states of the animal, what he is to himself as an inner life; others concern his original and acquired ways of response, his behavior, what he is an outside observer.
Edward Thorndike

Sometimes a great wound or concussion of the head, especially which happens by falling headlong from an high place, brings a prejudice and weakness to the animal faculty, dulling the understanding.
Thomas Willis

Struggle is the father of all things. It is not by the principles of humanity that man lives or is able to preserve himself above the animal world, but solely by means of the most brutal struggle.
Adolf Hitler

Subordination tends greatly to human happiness. Were we all upon an equality, we should have no other enjoyment than mere animal pleasure.
Samuel Johnson

Take the crocodile, for example, my favorite animal. There are 23 species. Seventeen of those species are rare or endangered. They're on the way out, no matter what anyone does or says, you know.
Steve Irwin

Thanks to our present surgical methods in physiology we can demonstrate at any time almost all phenomena of digestion without the loss of even a single drop of blood, without a single scream from the animal undergoing the experiment.
Ivan Pavlov

The absence of the heavy boot of Europe has preserved to these people the agile walk of the wild animal, while the general simplicity of their lives has given them many other points of physical perfection.
John Millington Synge

The animal is ignorant of the fact that he knows. The man is aware of the fact that he is ignorant.
Victor Hugo

The best opinion now is, that there are multitudinous forms which are not sufficiently differentiated to be distinctively either plant or animal, while, as respects ordinary plants and animals, the difficulty of laying down a definition has become far greater than ever before.
Asa Gray