Date: 1751

"The laws of mind, and the laws of matter, are in this respect perfectly similar; tho', in making the comparison, we are apt to deceive ourselves."

— Home, Henry, Lord Kames (1696-1782)

Date: 1751

"A weak motive makes some impression: but, in opposition to one more powerful, it has no effect to determine the mind. In the precise same manner, a small force will not overcome a great resistance; nor the weight of an ounce in one scale, counter-balance a pound in the other."

— Home, Henry, Lord Kames (1696-1782)

Date: 1751

"If the brain, or some part of it, were not in a manner the fountain of sensation and motion, and more peculiarly the seat of the mind than the other bowels or members of the body; why should a slight inflammation of its membranes cause madness, or a small compression of it produce a palsy or apo...

— Whytt, Robert (1714-1766)

Date: 1751

"Nay, Epicurus himself, according to Lucretius, did not look upon these two as separate beings, but regarded the mind as a kind of mouvement produced by the anima or soul."

— Whytt, Robert (1714-1766)

Date: 1751

"The mind, therefore, in producing the vital and other involuntary motions, does not act as a rational, but as a sentient principle; which, without reasoning upon the matter, is as necessarily determined by an ungrateful sensation or stimulus affecting the organs, to exert its power, in bringing ...

— Whytt, Robert (1714-1766)

Date: 1751

"Nay, while, in man, the brain is the principal seat of the soul, where it most eminently displays its powers; it seems to exist so equally through the whole bodies of insects, as that its power or influence scarce appears more remarkable in one part than another: and hence it is, that, in such c...

— Whytt, Robert (1714-1766)

Date: 1754, 1762

"The licence, which the parliament had bestowed on this spirit, by checking ecclesiastical authority; the countenance and encouragement, with which they had honoured it; had already diffused its influence to a wonderful degree: And all orders of men had drunk deep of the intoxicating poison."

— Hume, David (1711-1776)

Date: 1757

"The universal propensity to believe in invisible, intelligent power, if not an original instinct, being at least a general attendant of human nature, may be considered as a kind of mark or stamp, which the divine workman has set upon his work."

— Hume, David (1711-1776)

Date: 1757

"Since, therefore, the mind of man appears of so loose and unsteddy a contexture, that, even at present, when so many persons find an interest in continually employing on it the chissel and the hammer, yet are they not able to engrave theological tenets with any lasting impression; how much more ...

— Hume, David (1711-1776)

Date: 1759

"But when a father fails in the ordinary degree of parental affection towards a son; when a son seems to want that filial reverence which might be expected to his father; when brothers are without the usual degree of brotherly affection; when a man shuts his breast against compassion, and refuses...

— Smith, Adam (1723-1790)