My guess is that well over eighty per cent. of the human race goes through life without having a single original thought.

How little it takes to make life unbearable: a pebble in the shoe, a cockroach in the spaghetti, a woman's laugh.

The notion that science does not concern itself with first causes - that it leaves the field to theology or metaphysics, and confines itself to mere effects - this notion has no support in the plain facts. If it could, science would explain the origin of life on earth at once - and there is every reason to believe that it will do so on some not too remote tomorrow. To argue that gaps in knowledge which will confront the seeker must be filled, not by patient inquiry, but by intuition or revelation, is simply to give ignorance a gratuitous and preposterous dignity.

Next to the semi-colon, quotation marks seem to be the chief butts of reformatory ardor.

Democracy the domination of unreflective and timorous men, moved in vast herds by mob conditions.

the average man does not want to be free. he simply wants to be safe.

Man is a beautiful machine that works very badly. He is like a watch of which the most that can be said is that its cosmetic effect is good.