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: 1674

"And as for the Bipartition of this Sensitive Soul into two principle members as it were, or active sourses; vix. the Fiery part, upon which Life depends; and the Lucid, from whence all the faculties Animal are, like so many distinct rayes of light, derived."

— Charleton, Walter (1620-1707)

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)