18th-century Philosopher Quotes
The animal is a system of different organic molecules, which, impelled by dim sensations similar to those of obtuse and vague touch - sensations which have been imparted to them by Him who created matter in general - have combined, until each has found the position most suitable to its form and to its repose.
At Genoa, the word Liberty may be read over the front of the prisons and on the chains of the galley-slaves. This application of the device is good and just. It is indeed only malefactors of all estates who prevent the citizen from being free. In the country in which all such men were in the galleys, the most perfect liberty would be enjoyed.
Pope has elegantly said a perfect woman's but a softer man. And if we take in the consideration, that there can be but one rule of moral excellence for beings made of the same materials, organized after the same manner, and subjected to similar laws of Nature, we must either agree with Mr. Pope, or we must reverse the proposition, and say, that a perfect man is a woman formed after a coarser mold.
And what is the religion of many persons but a kind of demonism that delights in human sacrifices and causes them to look with horror on the greatest part of mankind? Plutarch, it is well known, has observed very justly that it is better not to believe in a god than to believe him to be a capricious and malevolent being.
Seven hundred thousand men are said to have perished in the first two expeditions, which had been thus commenced and carried on by the pious zeal of the Christian church, and in the total amount, several million were found numbered with the dead: the awful effects of religious fanaticism presuming upon the aid of heaven.
In the stage of manhood alone does the human race first appear in his dignity; only there are his principles fixed, his connections appropriate, he sees the full circumference of his sphere; there alone — after we have already learned through many detours, through long, repeated, sad experiences, what a calamity it is to arrogate the rights of others, to raise oneself over others through mere external advantages, to use his size to the detriment of others — there alone one recognizes, believes, feels what an honor, what a joy it is to be a human being.
Chemistry itself is a science which advances securely upon the beaten path of experience, even when it does not turn back to first principles. But a science which in itself is so rich, and which has lately made such great progress towards system, surely deserves to be led back to such principles.
If the semi-diameter of a sphere of the same density as the Sun in the proportion of five hundred to one, and by supposing light to be attracted by the same force in proportion to its [mass] with other bodies, all light emitted from such a body would be made to return towards it, by its own proper gravity.