“I am the truth, since I am part of what is real, but neither more nor less than those around me.”

Source: Steppenwolf (1927), pp. 30-1
Context: I cannot understand nor share these joys, though they are within my reach, for which thousands of others strive. On the other hand, what happens to me in my rare hours of joy, what for me is bliss and life and ecstasy and exaltation, the world in general seeks at most in imagination; in life it finds it absurd. And in fact, if the world is right, if this music of the cafés, these mass enjoyments and these Americanised men who are pleased with so little are right, then I am wrong, I am crazy. I am in truth the Steppenwolf that I often call myself; that beast astray who finds neither home nor joy nor nourishment in a world that is strange and incomprehensible to him.

"Queen of the Black Coast" (1934)
Source: Conan the Barbarian Omnibus -The Original Stories
Context: He shrugged his shoulders. "I have known many gods. He who denies them is as blind as he who trusts them too deeply. I seek not beyond death. It may be the blackness averred by the Nemedian skeptics, or Crom's realm of ice and cloud, or the snowy plains and vaulted halls of the Nordheimer's Valhalla. I know not, nor do I care. Let me live deep while I live; let me know the rich juices of red meat and stinging wine on my palate, the hot embrace of white arms, the mad exultation of battle when the blue blades flame and crimson, and I am content. Let teachers and priests and philosophers brood over questions of reality and illusion. I know this: if life is illusion, then I am no less an illusion, and being thus, the illusion is real to me. I live, I burn with life, I love, I slay, and am content."

Letter to Lord Somers (26 September 1831) on the Reform Bill, quoted in J. R. M. Butler, The Passing of the Great Reform Bill (London: Longmans Green & Co., 1914), p. 255.
1830s

The Meaning of the Russian Revolution (1906) http://archive.org/stream/russianrevolutio00tols/russianrevolutio00tols_djvu.txt
Context: One might think that it must be quite clear to people not deprived of reason, that violence breeds violence; that the only means of deliverance from violence lies in not taking part in it. This method, one would think, is quite obvious. It is evident that a great majority of men can be enslaved by a small minority only if the enslaved themselves take part in their own enslavement. If people are enslaved, it is only because they either fight violence with violence or participate in violence for their own personal profit. Those who neither struggle against violence nor take part in it can no more be enslaved than water can be cut. They can be robbed, prevented from moving about, wounded or killed, but they cannot be enslaved: that is, made to act against their own reasonable will.

In A Man Without a Country (2005) p. 80–81 Vonnegut makes a very similar statement:
God Bless You, Dr. Kevorkian (1999)
Context: About belief or lack of belief in an afterlife: Some of you may know that I am neither Christian nor Jewish nor Buddhist, nor a conventionally religious person of any sort.
I am a humanist, which means, in part, that I have tried to behave decently without any expectation of rewards or punishments after I'm dead. My German-American ancestors, the earliest of whom settled in our Middle West about the time of our Civil War, called themselves "Freethinkers," which is the same sort of thing. My great grandfather Clemens Vonnegut wrote, for example, "If what Jesus said was good, what can it matter whether he was God or not?"
I myself have written, "If it weren't for the message of mercy and pity in Jesus' Sermon on the Mount, I wouldn't want to be a human being. I would just as soon be a rattlesnake."

Source: Dearly Devoted Dexter

Variant: I don't want to be somebody's crush. if somebody likes me, i want them to like the real me, not what they think i am. And i don't want them to carry it around inside. I want them to show me, so i can feel it too. - Sam
Source: The Perks of Being a Wallflower

1840s, Essays: First Series (1841), Self-Reliance