Date: 1763 (repr. 1776); 1794 (repr. 1799)

"When actual thought is suspended, there may remain some secret power of thinking resulting from the constitution of the soul, which will exert itself when the obstruction is removed. As a bow when bent has a disposition to straiten itself again, or a clock to strike, though the hammer be held ba...

— Doddridge, Philip (1702-1751)

Date: 1774

"A multitude of ideas, collected by such an imagination, form a confused chaos, in which inconsistent conceptions are often mixt, conceptions so unsuitable and disproportioned, that they can no more be combined into one regular work, than a number of wheels taken from different watches, can be un...

— Gerard, Alexander (1728-1795)

Date: March, 1778

"What that power is by which the conscious spirit governs and directs various mental faculties, is, it must be confessed, utterly inexplicable as long as our souls are enclosed in material frames. While a watch is shut up in its case, we cannot see how the operations of its curious machinery are ...

— Boswell, James (1740-1795)

Date: March, 1778

"And my similitude between a watch in its case, and the soul in its material frame, will, I persuade myself, be agreeable to all my readers, whose dispositions are mild, and like better to be pleased with what they read, than to attack it."

— Boswell, James (1740-1795)

Date: 1785

"BOSWELL. 'But, sir,'tis like walking up and down a hill; one man will naturally do the one better than the other. A hare will run up a hill best, from her fore-legs being short; a dog down.' JOHNSON. 'Nay, sir; that is from mechanical powers. If you make mind mechanical, you may argue in that ma...

— Boswell, James (1740-1795)

Date: January, 1884

"And in states of extreme brain-fag the horizon is narrowed almost to the passing word, -- the associative machinery, however, providing for the next word turning up in orderly sequence, until at last the tired thinker is led to some kind of a conclusion."

— James, William (1842-1910)

Date: 1901-2, 1902

"In the end we fall back on the hackneyed symbolism of a mechanical equilibrium. A mind is a system of ideas, each with the excitement it arouses, and with tendencies impulsive and inhibitive, which mutually check or reinforce one another."

— James, William (1842-1910)

Date: 1964

"Its productivity and efficiency, its capacity to increase and spread comforts, to turn waste into need, and destruction into construction, the extent to which this civilization transforms the object world into an extension of man's mind and body makes the very notion of alienation questionable. ...

— Marcuse, Herbert (1898-1979)

Date: November 22, 1990

"One is not an immaterial soul, floating around in a machine."

— Sacks, Oliver (b. 1933)

Date: 1999

"On its own this trigger, as we can see from the earlier definition, is not going to generate consciousness. Imagine a candyfloss machine with a stick in the centre that then gathers more and more candyfloss as time goes on. Think of the epicentre as the stick in the centre, the burgeoning candy...

— Greenfield, Susan (b. 1950)