“If we do not allow free thinking in chemistry or biology, why should we allow it in morals or politics?”

Religion is an illusion of childhood, outgrown under proper education.

Mathematical Analysis is… the true rational basis of the whole system of our positive knowledge.

Nothing is destroyed until it is replaced.

The dead govern the living.

Woman is the most moral element in all humanity.

The word right should be excluded from political language, as the word cause from the language of philosophy.

Men are not allowed to think freely about chemistry and biology: why should they be allowed to think freely about political philosophy?

The universe displays no proof of an all-directing mind.

Humanity is always made up of more dead than living.

Positivism is a theory of knowledge according to which the only kind of sound knowledge available to human kind is that if science grounded in observation.

Every science consists in the coordination of facts; if the different observations were entirely isolated, there would be no science.

Ideas govern the world, or throw it into chaos.

Know yourself to improve yourself.

Everything is relative; and only that is absolute.

The law is this: that each of our leading conceptions-each branch of our knowledge-passes successively through three different theoretical conditions: the Theological, or fictitious: the Metaphysical, or abstract; and the Scientific, or positive.

But now, I, August Comte, have discovered the truth. Therefore, there is no longer any need for freedom of thought or freedom of the press. I want to rule and to organize the whole country.

Chemistry is a class you take in high school or college, where you figure out two plus two is 10, or something.

It seemed, indeed, that the study of light-scattering might carry one into the deepest problems of physics and chemistry.

Photosynthetic organisms in the sea yield most of the oxygen in the atmosphere, take up and store vast amounts of carbon dioxide, shape planetary chemistry, and hold the planet steady.

Man can be understood only by ascending from physics, chemistry, biology, and geology. In other words, he is first of all a cosmic problem.

But the other guys that you have have to accept their leadership. They have to respond to it. That’s the chemistry that you never know how that is going to happen.

I don’t know if I believe in love at first sight, but of course I believe in two people having chemistry right away.

I crave and seek a natural explanation of all phenomena upon this earth, but the word ‘natural’ to me implies more than mere chemistry and physics.

It is the supreme honour that a scientist can receive. Some of the giants in physics and chemistry have received this prize.