A History of Freedom of Thought

The truth is that Sacred Books are an obstacle to moral and intellectual progress, because they consecrate the ideas of a given epoch, and its customs, as divinely appointed.

During the two centuries in which they had been a forbidden sect the Christians had claimed toleration on the ground that religious belief is voluntary and not a thing which can be enforced.

Other cases are recorded which show that anti-religious thought was liable to be persecuted.

Anaxagoras was a blasphemer who taught that the gods were abstractions and that the sun, to which the ordinary Athenian said prayers morning and evening, was a mass of flaming matter.

To return to the early philosophers, who were mostly materialists, the record of their speculations is an interesting chapter in the history of rationalism. Two great names may be selected, Heraclitus and Democritus, because they did more perhaps than any of the others, by sheer hard thinking, to train reason to look upon the universe in new ways and to shock the unreasoned conceptions of common sense.

We must remember that the Homeric poems were never supposed to be the word of God. It has been said that Homer was the Bible of the Greeks. The remark exactly misses the truth. The Greeks fortunately had no Bible, and this fact was both an expression and an important condition of their freedom.

In the Middle Ages a man who believed on authority that there is a city called Constantinople and that comets are portents signifying divine wrath, would not [17] distinguish the nature of the evidence in the two cases. You may still sometimes hear arguments amounting to this: since I believe in Calcutta on authority, am I not entitled to believe in the Devil on authority?

The distinction may seem so obvious as to be hardly worth making. But it is important to be quite clear about it. The primitive man who had learned from his elders that there were bears in the hills and likewise evil spirits, soon verified the former statement by seeing a bear, but if he did not happen to meet an evil spirit, it did not occur to him, unless he was a prodigy, that there was a distinction between the two statements; he would rather have argued, if he argued at all, that as his tribesmen were right about the bears they were sure to be right also about the spirits.

is obvious that every one’s knowledge would be very limited indeed, if we were not justified in accepting facts on the authority of others.

you ask somebody how he knows something, he may say, “I have it on good authority,” or, “I read it in a book,” or, “It is a matter of common knowledge,” or, “I learned it at school.” Any of these replies means that he has accepted information from others, trusting in their knowledge, without verifying their statements or thinking the matter out for himself.