Date: 1664

"And finally, when a rational soul is present in this machine it will have its principal seat in the brain, and reside there like the fountain-keeper who must be stationed at the tanks to which the fountain's pipes return if he wants to produce, or prevent, or change their movements in some way."

— Descartes, René (1596-1650)

Date: 1664

"What does the Soul, but (like an excellent Chymist) in this internal Laboratory of Man, by a fermentation of our nourishment in the stomach and guts, a filtration thereof through the Lacteae, a digestion in the Heart, a Circulation and Rectification in the Veins and Arteries: what does she, I sa...

— Power, Henry (1623-1668)

Date: 1665

"The passions are the only orators who always convince"

— La Rochefoucauld, François, duc de (1613-1680)

Date: 1665

"And indeed, the Thoughts of many a Person, are oftentimes so active, and restless, that something or other they must, and will perpetually be doing; and like unruly Souldiers, if you have not a care to employ them well, they will employ themselves ill."

— Boyle, Robert (1627-1691)

Date: 1665

"The Understanding is to order all the inferiour services of the lower Faculties; but yet it is to do this only as a lawful Master, and not as a Tyrant."

— Hooke, Robert (1635-1703)

Date: 1667

"Now I'm again possest / Of that late fugitive, my Breast"

— Philips [née Fowler], Katherine (1632-1664)

Date: 1667

"Conscience is Christs Vicar in mans heart, / It keeps Court there, and acts the Judges part"

— Billingsley, Nicholas (bap. 1633, d. 1709)

Date: 1667

Conscience "is our Patron, our Apologist; / It is impartial, active, and sincere, / Gods Register in us; his Harbinger / For to prepare his way; this is beside / Mans faithful Surety, Treasurer and Guide."

— Billingsley, Nicholas (bap. 1633, d. 1709)

Date: 1667

"It is our narrow thoughts shorten these things, / By their companion Flesh inclin'd; / Which feeling its own weakness gladly brings / The same opinion to the Mind."

— Philips [née Fowler], Katherine (1632-1664)

Date: 1667; 2nd ed. in 1674

"But know that in the soul / Are many lesser faculties, that serve / Reason as chief; among these Fancy next / Her office holds; of all external things / Which the five watchful senses represent, / She forms imaginations, aery shapes, / Which Reason, joining or disjoining, frames / All what...

— Milton, John (1608-1674)