Date: 1660, 1676

"In these men the principles are holy, the instruction perfect, the law remaining, the perswasions uncancelled; but against all this torrent there is a whirlwind of passions, and filthy resolutions, and wilfulness, which corrupt the heart, while as yet the head is uncorrupted in the direct rules ...

— Taylor, Jeremy (bap. 1613, 1667)

Date: 1664

"The parts of the blood which penetrate as far as the brain serve not only to nourish and sustain its substance, but also and primarily to produce in it a certain very fine wind, or rather a very lively and pure flame, which is called the animal spirits."

— Descartes, René (1596-1650)

Date: 1664

"But the source which produces these spirits is usually so abundant that they enter these cavities in sufficient quantity to have the force to push out against the surrounding matter and make it expand, thus tightening all the tiny nerve-fibres which come from it (in the way that a moderate wind ...

— Descartes, René (1596-1650)

Date: 1664

"To this I answer, that do but intensly observe any one of the former spots or clouds, and you shall see it go quite along from the tail to the head, keeping alwayes an equal distance from the precedent and subsequent spot: so that it is far more ingenious to believe it to be a gale of Animal Spi...

— Power, Henry (1623-1668)

Date: 1673

" For tho the adulterations of art, can represent in the same Face beauty in one position, and deformity in another, yet nature is more sincere, and never meant a serene and clear forhead, should be the frontispiece to a cloudy tempestuous heart."

— Allestree, Richard (1611/2-1681)

Date: 1674

"This Glandule which he supposeth to be so easily flexible and yielding to contrary impulses, is not loosely suspended, but fixed: so that whoever hath once beheld the solid basis, strong consistence, and firm connexion thereof, will hardly ever be brought to allow it capable of any impulse to ei...

— Charleton, Walter (1620-1707)

Date: 1682

"Betwixt violent Passion, and a Fluctuation, or Wambling of the Mind, there is such a Difference, as betwixt the Agitation of a Storm, and the Nauseous Sickness of a Calm."

— L'Estrange, Sir Roger (1616-1704)

Date: 1686, 1689, 1697

"The grand Instruments by which the Understanding works, are Memory and Invention: Now, since these Faculties have their foundation in the sensitive Capacity, as this Prop is withdrawn, the Understanding must of Consequence be more clouded and obscure."

— Nourse, Timothy (c.1636–1699)

Date: 1690, 1694, 1695, 1700, 1706

"A Man on the Rack, is not at liberty to lay by the Idea of pain, and divert himself with other Contemplations: And sometimes a boisterous Passion hurries our Thoughts, as a Hurricane does our Bodies, without leaving us the liberty of thinking on other things, which we would rather chuse."

— Locke, John (1632-1704)

Date: 1690, 1694, 1695, 1700, 1706

"At least they interpose themselves so much between our understandings and the truth which it would contemplate and apprehend, that like the medium through which visible objects pass, their obscurity and disorder do not seldom cast a mist before our eyes, and impose upon our understandings."

— Locke, John (1632-1704)