"As 'tis from the disposition of visible and tangible objects we receive the idea of space, so from the succession of ideas and impressions we form the idea of time." (28)

"Nothing is ever really present with [or to] the mind but its perceptions or impressions and ideas." (49)

"To hate, to love, to think, to feel, to see; all this is nothing but to perceive." (49)

"Thus my general position, that an opinion or belief is nothing but a strong and lively idea derived from a present impression related to it ..." (73)

"What! The efficacy of causes lie[s] in the determination of the mind! As if causes did not operate entirely independent of the mind, and wou'd not continue their operation, even tho' there was no mind existent to contemplate them, or reason concerning them." (113)

"For my part, when I enter most intimately into what I call myself, I always...