Date: 101

One should be cautious in his intimacies because, "[f]or if a man places a piece of quenched charcoal close to a piece that is burning, either the quenched charcoal will quench the other, or the burning charcoal will light that which is quenched."

— Epictetus (c. 55-c.135)

Date: 1637

"I supposed, too, that in the beginning God did not place in this body any rational soul or any other thing to serve as a vegetative or sensitive soul, but rather that he kindled in its heart one of those fires without light which I had already explained, and whose nature I understood to be no di...

— Descartes, René (1596-1650)

Date: 1652

"Many sparks and appearances fly from variety of objects to the understanding; The minde, that catches them all, and cherishes them, and blows them; and thus the Candle of knowledge is lighted."

— Culverwell, Nathanael (bap. 1619, d. 1651)

Date: 1686, 1689, 1697

"As soon as ever the Parts begin to be form'd by Nature, this Animal and active Principle begins to exert its Heat and Force, being lodged in the Heart as in the Centre of the Body, from whence, as the Vessels begin also to be form'd, it distributes it self towards the extreme Regions, communicat...

— Nourse, Timothy (c.1636–1699)

Date: 1704

"Remark your commonest pretender to a light within, how dark, and dirty, and gloomy he is without; as lanterns which, the more light they bear in their bodies, cast out so much the more soot and smoke and fuliginous matter to adhere to the sides."

— Swift, Jonathan (1667-1745)

Date: December 10, 1774; 1775

"The mind, or genius has been compared to a spark of fire, which is smothered by a heap of fewel, and prevented from blazing into a flame: This simile which is made use of, by the younger Pliny, may be easily mistaken for argument or proof."

— Reynolds, Joshua (1723-1792)

Date: December 10, 1774; 1775

"There is no danger of the mind's being over-burthened with knowledge, or the genius extinguished by any addition of images; on the contrary, these acquisitions may be as well, perhaps better, be compared, if comparisons signified any thing in reasoning, to the supply of living embers, which will...

— Reynolds, Joshua (1723-1792)

Date: December 10, 1774; 1775

"Our hearts frequently warmed in this manner, by the contact of those whom we wish to resemble, will undoubtedly catch something of their way of thinking, and we shall receive in our own bosoms some radiation at least of their fire and splendour."

— Reynolds, Joshua (1723-1792)

Date: December 10, 1776; 1777

"But I am persuaded, that scarce a poet is to be found, from Homer down to Dryden, who preserved a sound mind in a sound body, and continued practising his profession to the very last, whose later works are not as replete with the fire of imagination, as those which were produced in...

— Reynolds, Joshua (1723-1792)

Date: December 11, 1786; 1787

"Because these Arts, in their highest province, are not addressed to the gross senses, but to the desires of the mind, to that spark of divinity which we have within, impatient of being circumscribed and pent up by the world which is about us."

— Reynolds, Joshua (1723-1792)