The idea of protoplasm, which was really a name for our ignorance, [is] only a little less misleading than the expression "Vital force".

Money can buy a fine dog but it is kindness that makes him wag his tail.

Capitalism, though it may not always give the scientific worker a living wage, will always protect him, as being one of the geese which produce golden eggs for its table.

This is my prediction for the future: Whatever hasn't happened will happen, and no one will be safe from it.

Teleology is like a mistress to a biologist: he cannot live without her but he's unwilling to be seen with her in public.

Science is vastly more stimulating to the imagination than the classics.

The wise man regulates his conduct by the theories both of religion and science. But he regards these theories not as statements of ultimate fact but as art-forms.

Christianity is haunted by the theory of a God with a craving for bloody sacrifices.

Reality is the cage of those who lack imagination.

There is no great invention, from fire to flying, which has not been hailed as an insult to some god.

Would I lay down my life to save my brother? No, but I would to save two brothers or eight cousins.

People can think only in images. If you want to be a philosopher, write novels.

It is only the man that delays his gratification that is a man indeed.

An enlightened man had but one duty - to seek the way to himself, to reach inner certainty, to grope his way forward, no matter where it led.

We have believed - and we do believe now - that freedom is indivisible, that peace is indivisible, that economic prosperity is indivisible

Content-based marketing gets repeated in social media and increases word-of-mouth mentions; it's the best way to gather buzz about a product.

She laughed like she'd just invented laughter.​

We need to ensure that children are not forced to waste their time on barren rubbish.

The truth was, I wasn't sure. But I wanted to keep believing people could change, and it was certainly easier to do so when you were in the midst of it.

Grace does not destroy nature, it perfects it.

Habit is thus the enormous fly-wheel of society, its most precious conservative agent. It alone is what keeps us all within the bounds of ordinance.