E2P12

Proposition — Part II

Latin

Quicquid in objecto ideæ humanam mentem constituentis contingit, id ab humana mente debet percipi sive ejus rei dabitur in mente necessario idea hoc est si objectum ideæ humanam mentem constituentis sit corpus, nihil in eo corpore poterit contingere quod a mente non percipiatur.

English (Elwes 1883)

Whatsoever comes to pass in the object of the idea, which constitutes the human mind, must be perceived by the human mind, or there will necessarily be an idea in the human mind of the said occurrence. That is, if the object of the idea constituting the human mind be a body, nothing can take place in that body without being perceived by the mind.

Modern English

Whatever comes to pass in the object of the idea that constitutes the human mind must be perceived by the human mind, or there will necessarily be an idea of that thing in the mind. That is: if the object of the idea constituting the human mind is a body, nothing can occur in that body without being perceived by the mind.