''It is a mistake, to think the same thing affects both sight and touch. If the same angle or square, which is the object of touch, be also the object of vision, what should hinder the blind man, at first sight, from knowing it?''
''Many things, for aught I know, may exist, whereof neither I nor any other man hath or can have any idea or notion whatsoever.''
''The eye by long use comes to see even in the darkest cavern: and there is no subject so obscure but we may discern some glimpse of truth by long poring on it.''
''That neither our thoughts, nor passions, nor ideas formed by the imagination, exist without the mind, is what every body will allow.''
''That thing of hell and eternal punishment is the most absurd, as well as the most disagreeable thought that ever entered into the head of mortal man.''
''To me it seems that liberty and virtue were made for each other. If any man wish to enslave his country, nothing is a fitter preparative than vice; and nothing leads to vice so surely as irreligion.''
''There being in the make of an English mind a certain gloom and eagerness, which carries to the sad extreme; religion to fanaticism; free-thinking to atheism; liberty to rebellion.''
''Query: Whether the difference between a mere computer and a man of science be not, that the one computes on principles clearly conceived, and by rules evidently demonstrated, whereas the other doth not?''
''The same principles which at first view lead to skepticism, pursued to a certain point, bring men back to common sense.''
''All that stock of arguments [the skeptics] produce to depreciate our faculties, and make mankind appear ignorant and low, are drawn principally from this head, to wit, that we are under an invincible blindness as to the true and real nature of things.''
''The most ingenious men are now agreed, that [universities] are only nurseries of prejudice, corruption, barbarism, and pedantry.''
''I had rather be an oyster than a man, the most stupid and senseless of animals.''
''All those who write either explicitly or by insinuation against the dignity, freedom, and immortality of the human soul, may so far forth be justly said to unhinge the principles of morality, and destroy the means of making men reasonably virtuous.''
''I might as well doubt of my own being, as of the being of those things I actually see and feel.''
''Truth is the cry of all, but the game of few.''
''What doubts, what hypotheses, what labyrinths of amusement, what fields of disputation, what an ocean of false learning, may be avoided by that single notion of immaterialism!''
''To be is to be perceived [Esse est percipi].''
''Others indeed may talk, and write, and fight about liberty, and make an outward pretence to it; but the free-thinker alone is truly free.''
''Of all men living [priests] are our greatest enemies. If it were possible, they would extinguish the very light of nature, turn the world into a dungeon, and keep mankind for ever in chains and darkness.''
''In short, if there were external bodies, it is impossible we should ever come to know it; and if there were not, we might have the very same reasons to think there were that we have now.''
''A mind at liberty to reflect on its own observations, if it produce nothing useful to the world, seldom fails of entertainment to itself.''
''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.''
''So long as I confine my thoughts to my own ideas divested of words, I do not see how I can be easily mistaken.''
''How often must I repeat, that I know or am conscious of my own being; and that I myself am not my ideas, but somewhat else, a thinking, active principle that perceives, knows, wills, and operates about ideas?''
''I do not deny the existence of material substance merely because I have no notion of it, but because the notion of it is inconsistent, or in other words, because it is repugnant that there should be a notion of it.''