We find it easy to believe that praise is sincere: why should anyone lie in telling us the truth?.

My pessimism extends to the point of even suspecting the sincerity of other pessimists..

The biologist passes. The frog stays the same..

We must watch over our modesty in the presence of those who cannot understand its grounds..

One kills a man, one is an assassin; one kills millions, one is a conqueror; one kills everybody, one is a god..

God, that checkroom of our dreams..

Never feel remorse for what you have thought about your wife; she has thought much worse things about you..

Quotations--always inexact. I don't trust people who cannot even copy out..

Take heed of critics even when they are not fair; resist them even when they are..

The nobility of a human being is strictly independent of that of his convictions..

Far too often the choices reality proposes are such as to take away one's taste for choosing..

Greatness, in order to gain recognition, must all too often consent to ape greatness..

To live is often to struggle toward goals one has no desire to reach..

Kill one man, and you are a murderer. Kill millions of men, and you are a conqueror. Kill them all, and you are a god..

Science had better not free the minds of men too much, before it has tamed their instincts..

Nothing leads the scientist so astray as a premature truth..

There are things that don't deserve to be said briefly..

The books one has written in the past have two surprises in store: one couldn't write them again, and wouldn't want to..

I still understand a few words in life, but I no longer think they make a sentence..

We bestow on others praise in which we do not believe, on condition that in return they bestow upon us praise in which we do..

Theories pass. The frog remains..