Joseph Priestley

The more we know of the works of God, the more we shall be filled with reverence and awe.

The human mind is a mirror, which reflects the images of external objects.

The most important discoveries are often made by those who are not afraid to make mistakes.

The progress of reason is slow, but sure.

The true philosopher is one who is always ready to acknowledge his errors, and to correct them.

The love of virtue is the noblest passion of the human soul.

In all research, the first thing to be discovered is that which is already known.

The greatest pleasure in life is doing what people say you cannot do.

Every man, upon inquiry, finds that the science of metaphysics is so involved in obscurity and dispute, that he is glad to leave it in the hands of those who have more leisure and ability for such studies.

The invention of printing, though not the discovery of any new art, yet, as it has opened the way to the knowledge of so many, and has been so far extended as to make the whole world scholars, may justly be ranked among the arts which are the parents of all the liberal sciences.

I have always thought that the most important discoveries are those which relate to the improvement of the human mind.

The progress of knowledge is like the circulation of the blood in the arteries of the body; it gives strength and vigor to all the faculties.

Tyranny is a habit which may be developed by democratic countries as well as by despotic ones.

What a beautiful application of chemistry to religion!

The mind of man is like a garden, which requires constant cultivation to produce its best fruits.

In the affairs of this world, men are saved, not by faith, but by the want of it.

Chemistry is a science that has the power to transform the world.

The love of liberty is the love of others; the love of power is the love of ourselves.

I never permit the personal antagonism which exists between some men to influence my judgment concerning them.

The study of nature is the study of God.