“Nothing is destroyed until it is replaced.”

The heavens declare the glory of Kepler and Newton.

Each department of knowledge passes through three stages. The theoretic stage; the theological stage and the metaphysical or abstract stage.

In mathematics we find the primitive source of rationality; and to mathematics must the biologists resort for means to carry out their researches.

The sacred formula of positivism: love as a principle, the order as a foundation, and progress as a goal.

Monotheism occupies so large a space in the view of modern minds, that it is scarcely possible to form a just estimate of the preceding phases of the theological philosophy.

All good intellects have repeated, since Bacon’s time, that there can be no real knowledge but which is based on observed facts.

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

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

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

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.

I’m against any religion, and Communism and Nazism – they’re both equally religions. They’re just replacement gods.

I feel great. I had a blood clot. It was a bad deal. But when I look at my friends with hip replacements, knee replacements, shoulder replacements, neck surgeries, back surgeries, I’ll take the blood clot.

Churchill knew instinctively what was wrong with communism – that it repressed liberty; that it replaced individual discretion with state control; that it entailed the curtailment of democracy, and therefore that it was tyrannous.

We have a very precise image – an image at times shameless – of what we have lost, but we are ignorant of what may follow or replace it.

One of the central lessons I have learned after a half century of working in the developing world is that the replacement of fear by hope is probably the single most powerful trampoline of progress.

The greatest moment of your life is now. This moment is God’s irreplaceable gift to you.

Imprisoned quacks are always replaced by new ones.

It’s not enough to rage against the lie.. you’ve got to replace it with the truth.