'Change' is scientific 'progress' is ethical change is indubitable whereas progress is a matter of controversy.

The good life is one inspired by love and guided by knowledge.

The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

The time you enjoy wasting is not wasted time.

Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

Men are born ignorant, not stupid. They are made stupid by education.

An Honest politician will not be tolerated by a democracy unless he is very stupid ... because only a very stupid man can honestly share the prejudices of more than half the nation.

If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have a paradise in a few years.

We have in fact, two kinds of morality, side by side: one which we preach, but do not practice, and another which we practice, but seldom preach.

The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd.

Cruel men believe in a cruel god and use their belief to excuse their cruelty. Only kindly men believe in a kindly god, and they would be kindly in any case.

No wise man ever wished to be younger.

What we did is important because we proved that virtually all of the wireless networks used by companies and hospitals are completely open and offer no protection for the data on them.

Contemplate the extent and stability of the heavens, and then at last cease to admire worthless things.

I train for two reasons. Number one, I love working out, and number two, I want to win. You can't win if you don't train to the best of your ability.

When children reach the age of sixteen, they discover the meaning of life: car keys.

I didn't find this memoir of these two eccentric people so different from doing my memoirs of De Sade or Simone Weil. My parents in their own way are as odd as Sade.

To be pregnant has been for me each time the supreme joy ... I was doing the greatest thing in the world without having to do anything -- all I had to do was be.

It is not what a man knows, but what he thinks of in time.

The aim of the missionary is to do God's will, not to be useful, not to win the heathan; he is useful and does win the heathen, but that is not his aim. His aim is to do the will of his Lord.

You can only aspire to what you see. That's why role modeling is important