“I want to proclaim a truth that would forever exile me from among the living. I know only the conditions but not the words that would allow me to formulate it.”

As quoted in

Black Elk Speaks (1961)
Context: They told me I had been sick twelve days, lying like dead all the while, and that Whirlwind Chaser, who was Standing Bear's uncle and a medicine man, had brought me back to life. I knew it was the Grandfathers in the Flaming Rainbow Tepee who had cured me; but I felt afraid to say so. My father gave Whirlwind Chaser the best horse he had for making me well, and many people came to look at me, and there was much talk about the great power of Whirlwind Chaser who had made me well all at once when I was almost the same as dead.
Everybody was glad that I was living; but as I lay there thinking about the wonderful place where I had been and all that I had seen, I was very sad; for it seemed to me that everybody ought to know about it, but I was afraid to tell, because I knew that nobody would believe me, little as I was, for I was only nine years old. Also, as I lay there thinking of my vision, I could see it all again and feel the meaning with a part of me like a strange power glowing in my body; but when the part of me that talks would try to make words for the meaning, it would be like fog and get away from me.
I am sure now that I was then too young to understand it all, and that I only felt it. It was the pictures I remembered and the words that went with them; for nothing I have ever seen with my eyes was so clear and bright as what my vision showed me; and no words that I have ever heard with my ears were like the words I heard. I did not have to remember these things; they have remembered themselves all these years. It was as I grew older that the meanings came clearer and clearer out of the pictures and the words; and even now I know that more was shown to me than I can tell.

On drugs. Allure magazine, January 2008.

The Gander, in Book Seven : What Saraïde Wanted, Ch. XLV : The Gander Also Generalizes
The Silver Stallion (1926)
Context: I do not seek to copy nature. I, on the contrary, create to divert me such faith and dreams as living among men would tend to destroy. But as it is, my worshipers depart from me heartedly, in this grey corridor, and they are devoid of fear and parvanimity; for the effect of my singing, like that of all great singing, is to fill my hearers with a sentiment of their importance as moral beings and the greatness of their destinies.

The Poet's Testament http://www.poemhunter.com/poem/the-poet-s-testament/
Other works

By the Babe Unborn poem, Delphi Works of G. K. Chesterton (Illustrated)
Source: https://books.google.com.br/books?id=LtwZAgAAQBAJ&printsec=frontcover&hl=pt-BR#v=onepage&q&f=false

Source: The Unfinished Autobiography (1951), Chapter II, Part 1

(20 December 2004)
Unfit for Mass Consumption (blog entries), 2004
Context: I'm not kidding, and I'm not being hyperbolic — sometimes I hate this thing I do more than I could ever say. Sometimes, it seems that I spend my days dragging people whose only crime is that I am their creator through the filth and pain and degradation of my own despicable imagination. Where is the good in this? Where is the resolution? Where is the sense of it? If I had even a scintilla of belief in a "higher" intelligence of any sort, days like yesterday (and, by extension, today) would, on the one hand, give me some degree of sympathy for the idiot dieties unable to craft a better universe, and, on the other hand, it makes me grateful I have no such beliefs, because the anger I would have for that "higher" whatever would be inexpressible. And I cannot imagine that there are actually people out there — self-professed "horror" writers — who are trying to elicit these emotions in others, who are purposefully driving their characters on through all the futile, dead-end nightmares that might be devised. I would not do this. I swear I would not do this, if I could find other words in me.

Source: The Philosophical Implications of Talking Vegetables (2005), p. 10