Date: 1651, 1668

"To conclude, the light of human minds is perspicuous words, but by exact definitions first snuffed, and purged from ambiguity; reason is the pace; increase of science, the way; and the benefit of mankind, the end."

— Hobbes, Thomas (1588-1679)

Date: 1651, 1668

"And on the contrary, metaphors, and senseless and ambiguous words, are like ignes fatui; and reasoning upon them is wandering amongst innumerable absurdities; and their end, contention and sedition, or contempt."

— Hobbes, Thomas (1588-1679)

Date: 1653

"Sad melancholy Thoughts are for Shadowes plac'd, / By which the lighter Fancies are more grac'd."

— Cavendish, Margaret (1623-1673)

Date: 1653

"Thoughts are for Shadowes plac'd, / By which the lighter Fancies are more graced. / As through a dark, and watry Cloud, more bright, / The Sun breakes forth with his Resplendent Light. / Or like to Night's black Mantle, where each Star / Doth clearer seem, so lighter Fancies are."

— Cavendish, Margaret (1623-1673)

Date: 1653

"Some like to Rain-bowes various Colours shew, / So round the Braine Fantastick Fancies grow."

— Cavendish, Margaret (1623-1673)

Date: 1748, 1749

"I always use the word imagine, because I am of the opinion that everything is imagined, and that all the parts of the soul may be justly reduced to the imagination only, which forms them all; and thus the judgment, reason, and memory are not absolute faculties of the soul, but real modifications...

— Julien Offray de La Mettrie (1709-1751)

Date: 1748, 1749

"Have we one argument of this sort to convince us that man alone is enlighten'd with the rays of reason, from which all other creatures are excluded?"

— Julien Offray de La Mettrie (1709-1751)