“It is indeed an opinion strangely prevailing amongst men, that houses, mountains, rivers, and in a word all sensible objects have an existence natural or real, distinct from their being perceived by the understanding. But with how great an assurance and acquiescence soever this principle may be entertained in the world; yet whoever shall find in his heart to call it in question, may, if I mistake not, perceive it to involve a manifest contradiction. For what are the forementioned objects but the things we perceive by sense, and what do we perceive besides our own ideas or sensations; and is it not plainly repugnant that any one of these or any combination of them should exist unperceived?' (Berkeley, 1710: 25)”

“I know what I mean by the term I and myself; and I know this immediately, or intuitively, though I do not perceive it as I perceive a triangle, a colour, or a sound.”

“From my own being, and from the dependency I find in myself and my ideas, I do, by an act of reason, necessarily infer the existence of a God, and of all created things in the mind of God.”

“If we admit a thing so extraordinary as the creation of this world, it should seem that we admit something strange, and odd, and new to human apprehension, beyond any other miracle whatsoever.”

“Few men think; yet all have opinions. ”

“Whilst part of what we perceive comes through our senses from the object before us, another part (and it may be the larger part) always comes out of our own mind.”

“You perceive the world with your five senses. When your mind perceives the world, then the world exists before you. But if we are born without any senses, then how could we perceive the world except as a dream in our minds? But then...dreams often seem as real as the world we see now. Look...If I touch you with this hand, I can remember touching you, but I can't ever prove I did. If reality is nothing more than what is in our mind, then what is the difference between this world and a dream?”