Physicists have determined that even the most solid and heavy mass of matter we see is mostly empty space. But read more

Physicists have determined that even the most solid and heavy mass of matter we see is mostly empty space. But at the submicroscopic level, specks of matter scattered through a vast emptiness have such incredible density and weight, and are linked to one another by such powerful forces, that together they produce all the properties of concrete, cast iron and solid rock. In much the same way, specks of knowledge are scattered through a vast emptiness of ignorance, and everything depends upon how solid the individual specks of knowledge are, and on how powerfully linked and coordinated they are with one another.

A line runs from the meditations of the heart to the words of the mouth. The meditations are not clear read more

A line runs from the meditations of the heart to the words of the mouth. The meditations are not clear to us until the mouth utters its words. If what the mouth utters is unclear or foolish or mendacious, it must be that the meditations are the same. But the line runs both ways. The words of the mouth will become the meditations of the heart, and the habit of loose talk loosens the fastenings of our understanding.

Every step in human progress, from the first feeble stirrings in the abyss of time, has been opposed by the read more

Every step in human progress, from the first feeble stirrings in the abyss of time, has been opposed by the great majority of men. Every valuable thing that has been added to the store of man's possessions has been derided by them when it was new, and destroyed by them when they had the power. They have fought every new truth ever heard of, and they have killed every truth-seeker who got into their hands.

Again men have been kept back as by a kind of enchantment from progress in science by reverence for antiquity, read more

Again men have been kept back as by a kind of enchantment from progress in science by reverence for antiquity, by the authority of men counted great in philosophy, and then by general consent.

To stay young requires unceasing cultivation of the ability to unlearn old falsehoods.

To stay young requires unceasing cultivation of the ability to unlearn old falsehoods.

Whatsoever is contrary to nature is contrary to reason, and whatsoever is contrary to reason is absurd.

Whatsoever is contrary to nature is contrary to reason, and whatsoever is contrary to reason is absurd.

We must respect the other fellow's religion, but only in the sense and to the extent that we respect his read more

We must respect the other fellow's religion, but only in the sense and to the extent that we respect his theory that his wife is beautiful and his children smart.

The prerequisite of originality is the art of forgetting, at the proper moment, what we know.

The prerequisite of originality is the art of forgetting, at the proper moment, what we know.

I have taken all knowledge to be my province.

I have taken all knowledge to be my province.