On the Improvement of the Understanding
A conclusion of this sort, though it be certain, is yet not to be relied on without great caution; for unless we are exceedingly careful we shall forthwith fall into error. When things are conceived thus abstractedly, and not through their true essence, they are apt to be confused by the imagination. For that which is in itself one, men imagine to be multiplex. To those things which are conceived abstractedly, apart, and confusedly, terms are applied which are apt to become wrested from their strict meaning, and bestowed on things more familiar; whence it results that these latter are imagined in the same way as the former to which the terms were originally given. [B.S.]