JOSEPH PRIESTLEY

What I have known with respect to myself, has tended much to lessen both my admiration, and my contempt, of others.

Will is nothing more than a particular case of the general doctrine of association of ideas, and therefore a perfectly mechanical thing.

Every man, when he comes to be sensible of his natural rights, and to feel his own importance, will consider himself as fully equal to any other person whatever.

Could we have entered into the mind of Sir Isaac Newton, and have traced all the steps by which he produced his great works, we might see nothing very extraordinary in the process.

A totally new era in the history of mankind.

Let us not... contend about merit , but let us all be intent on forwarding the common enterprize , and equally enjoy any progress we may make towards succeeding in it; and above all, let us acknowledge the guidance of that Great Being, who has put a spirit in man, and whose inspiration giveth him understanding .

But it is not given to every electrician to die in so glorious a manner as the justly envied Richmann.

From the fame opinion of a soul distinct from the body came the practice of praying, first for the dead, and then to them with a long train of other absurd opinions, and superstitious practices.

It is hardly possible not to suspect the truth of this doctrine of atonement, when we consider that the general maxims to which it may be reduced, are nowhere laid down, or asserted, in the Scriptures, but others quite contrary to them.

It pleased God to make one nation the medium of all His communications with mankind: This the nation of the Jews has done to a considerable degree in all ages As civilization extended, they by one means or another became most wonderfully dispersed through all countries; and at this day they are almost literally everywhere, the most conspicuous, and in the eye of reason and religion, the most respectable nation on the face of the earth.

The mind of man can never be wholly barren. Through our whole lives we are subject to successive impressions; for, either new ideas are continually flowing in, or traces of the old ones are marked deeper. If, therefore, you be not acquiring good principles be assured that you are acquiring bad ones; if you be not forming virtuous habits you are, how insensibly soever to yourselves, forming vicious ones.

Lying is a crime the least liable to variation in its definitions. A child will upon the slightest temptation tell an untruth as readily as the truth. That is, as soon as he can suspect that it will be to his advantage; and the dread that he afterward has of telling a lie is acquired principally by his being threatened, punished, and terrified by those who detect him in it, till at length, a number of painful impressions are annexed to the telling of an untruth, and he comes even to shudder at the thought of it.

It is known to all persons who are conversant in experimental philosophy, that there are many little attentions and precautions necessary to be observed in the conducting of experiments, which cannot well be described in words, but which it is needless to describe, since practice will necessarily suggest them; though, like all other arts in which the hands and fingers are made use of, it is only much practice that can enable a person to go through complex experiments, of this or any kind, with ease and readiness.

How glorious, then, is the prospect, the reverse of all the past, which is now opening upon us, and upon the world. Government, we may now expect to see, not only in theory and in books but in actual practice, calculated for the general good, and taking no more upon it than the general good requires, leaving all men the enjoyment of as many of their natural rights as possible, and no more interfering with matters of religion, with men's notions concerning God, and a future state, than with philosophy, or medicine.

Had Mr. Gibbon lived in France, Spain, or Italy, he might with the fame reason have ranked the doctrine of transubstantiation, and the worship of saints and angels among the essentials of Christianity, as the doctrines of the trinity and of the atonement.

The greater is the circle of light, the greater is the boundary of the darkness by which it is confined. But, notwithstanding this, the more light get, the more thankful we ought to be, for by this means we have the greater range for satisfactory contemplation. time the bounds of light will be still farther extended; and from the infinity of the divine nature, and the divine works, we may promise ourselves an endless progress in our investigation them: a prospect truly sublime and glorious.

[The doctrine of air] I was led into in consequence of inhabiting a house adjoining to a public brewery, where I at first amused myself with making experiments on the fixed air [carbon dioxide] which I found ready made in the process of fermentation . When I removed from that house I was under the necessity of making the fixed air for myself; and one experiment leading to another, as I have distinctly and faithfully noted in my various publications on the subject, I by degrees contrived a convenient apparatus for the purpose, but of the cheapest kind.

It is sufficiently evident from many circumstances, that the doctrine of the divinity of Christ did not establish itself without much opposition, especially from the unlearned among the Christians, who thought that it savoured of Polytheism , that it was introduced by those who had had a philosophical education, and was by degrees adopted by others, on account of its covering the great offence of the cross , by exalting the personal dignity of our Saviour.

We find upon all occasions, the early Christian writers speak of the Father as superior to the Son, and in general they give him the title of God , as distinguished from the Son; and sometimes they expressly call him, exclusively of the Son, the only true God ; a phraseology which does not at all accord with the idea of the perfect equality of all the persons in the Trinity. But it might well be expected, that the advances to the present doctrine of the Trinity should be gradual and slow. It was, indeed, some centuries before it was completely formed.

The wisdom of one generation will be folly in the next.

In completing one discovery we never fail to get an imperfect knowledge of others of which we could have no idea before, so that we cannot solve one doubt without creating several new ones.

Most of the early Christian writers thought the text "I and my Father are one," was to be understood of an unity or harmony of disposition only. Thus Tertullian observes, that the expression is unum , one thing, not one person; and he explains it to mean unity, likeness, conjunction, and of the love that the Father bore to the Son. Origen says, "let him consider that text, 'all that believed were of one heart and of one soul,' and then he will understand this, 'I and my Father are one".

The feeling of it to my lungs was not sensibly different from that of common air; but I fancied that my breast felt peculiarly light and easy for some time afterwards. Who can tell but that, in time, this pure air may become a fashionable article in luxury. Hitherto only two mice and myself have had the privilege of breathing it.

When we say there is a GOD, we mean that there is an intelligent designing cause of what we see in the world around us, and a being who was himself uncaused.

I have procured air [oxygen] ... between five and six times as good as the best common air that I have ever met with.