"For though the Geometrician perceive himself to make Lines, Triangles and Circles in the Dust, with his Finger, yet he is not aware, how he makes all those same Figures, first upon the Corporeal Spirits of his Brain, from whence notwithstanding, as from a Glass, they are reflected to him, Fancy being rightly concluded by Aristotle to be a Weak and Obscure Sense."
— Cudworth, Ralph (1617-1688)
(I.iii, pp. 160-1)
Ralph Cudworth, The True Intellectual System of the Universe: Wherein all the Reason and Philosophy of Atheism is Confuted and its Impossibility Demonstrated (London: Royston, 1678). <Link to EEBO>
See also Cudworth, Ralph. The True Intellectual System of the Universe: The First Part; Wherein All the Reason and Philosophy of Atheism is confuted, 2nd ed., 2 vols. (London: Printed for J. Walthoe, D. Midwinter, J. and J. Bonwick, W. Innys, R. Ware, 1743). <Link to ECCO>