Scientific progress consists in the development of new concepts.

Scientific progress consists in the development of new concepts.

It is common to assume that human progress affects everyone- that even the dullest man, in these bright days, knows read more

It is common to assume that human progress affects everyone- that even the dullest man, in these bright days, knows more than any man of, say, the Eighteenth Century, and is far more civilized. This assumption is quite erroneous...The great masses of men, even in this inspired republic, are precisely where the mob was at the dawn of history. They are ignorant, they are dishonest, they are cowardly, they are ignoble. They know little if anything that is worth knowing, and there is not the slightest sign of a natural desire among them to increase their knowledge.

The rule seems to be that those who find no difficulty in deceiving themselves are easily deceived by others. They read more

The rule seems to be that those who find no difficulty in deceiving themselves are easily deceived by others. They are easily persuaded and led.

He who allows oppression shares the crime.

He who allows oppression shares the crime.

The Darwinian theory is in principle capable of explaining life. No other theory that has ever been suggested is in read more

The Darwinian theory is in principle capable of explaining life. No other theory that has ever been suggested is in principle capable of explaining life.

There exist limitless opportunities in every industry. Where there is an open mind, there will always be a frontier.

There exist limitless opportunities in every industry. Where there is an open mind, there will always be a frontier.

A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at read more

A nation can survive its fools, and even the ambitious. But it cannot survive treason from within. An enemy at the gates is less formidable, for he is known and carries his banner openly. But the traitor moves amongst those within the gate freely, his sly whispers rustling through all the alleys, heard in the very halls of government itself. For the traitor appears not a traitor; he speaks in accents familiar to his victims, and he wears their face and their arguments, he appeals to the baseness that lies deep in the hearts of all men. He rots the soul of a nation, he works secretly and unknown in the night to undermine the pillars of the city, he infects the body politic so that it can no longer resist. A murderer is less to fear. The traitor is the plague.

I find it valid to understand man as an animal before I am prepared to know him as a man.

I find it valid to understand man as an animal before I am prepared to know him as a man.

The criterion of truth is that it works even if nobody is prepared to acknowledge it.

The criterion of truth is that it works even if nobody is prepared to acknowledge it.