“How fathomless the mystery of the Unseen is! We cannot plumb its depths with our feeble senses - with eyes which cannot see the infinitely small or the infinitely great, nor anything too close or too distant, such as the beings who live on a star or the creatures which live in a drop of water... with ears that deceive us by converting vibrations of the air into tones that we can hear, for they are sprites which miraculously change movement into sound, a metamorphosis which gives birth to harmonies which turn the silent agitation of nature into song... with our sense of smell, which is poorer than any dog's... with our sense of taste, which is barely capable of detecting the age of a wine!Ah! If we had other senses which would work other miracles for us, how many more things would we not discover around us!”

“The books which seal off the long perspectives, which sever us from our losses, which represent the world of potency as a world of act, these are the books which, when the drug wears off, go on to the dump with the other empty bottles. Those that continue to interest us move through time to an end, an end we must sense even if we cannot know it; they live in change, until, which is never, as and is are one.”

“Besides our eyes, skin and the other senses through which we receive the shadows of the exterior reality, we have a 'mental eye' (intelligence) with which we can perceive reality as it is.”

“While there is perhaps a province in which the photograph can tell us nothing more than what we see with our own eyes, there is another in which it proves to us how little our eyes permit us to see.”

“The attentions of others matter to us because we are afflicted by a congenital uncertainty as to our own value, as a result of which affliction we tend to allow others' appraisals to play a determining role in how we see ourselves. Our sense of identity is held captive by the judgements of those we live among.”

“What do we know,” he had said, “of the world and the universe about us? Our means of receiving impressions are absurdly few, and our notions of surrounding objects infinitely narrow. We see things only as we are constructed to see them, and can gain no idea of their absolute nature. With five feeble senses we pretend to comprehend the boundlessly complex cosmos, yet other beings with a wider, stronger, or different range of senses might not only see very differently the things we see, but might see and study whole worlds of matter, energy, and life which lie close at hand yet can never be detected with the senses we have. I have always believed that such strange, inaccessible worlds exist at our very elbows, and now I believe I have found a way to break down the barriers.”