“I am enraptured by Hindu philosophy, whose essential endeavor is to surmount the self; and everything I do, everything I think is only myself and the selfs humiliations.”

Source: The Counterlife (1986), Ch. 5

Todo es mentira en este mundo
Todo es mentira la verdad
Todo es mentira yo me digo
Todo es mentira ¿Por qué será?
Mentira https://www.youtube.com/watch_popup?v=PCZuYK3Rjig.
Clandestino (1998)

Edward Everett Hale in a statement published in A Year of Beautiful Thoughts‎ (1902) by Jeanie Ashley Bates Greenough, p. 172; <!-- and perhaps as early as an edition of Ten Times One is Ten (1870) by Hale--> This has been misattributed to Keller in published works since at least 1980. Keller and Hale were good friends, and letters to Hale can be found in her youthful autobiography The Story of My Life (1902). In 1910 Keller dedicated her poem "The Song of the Stone Wall" to Hale who had died in 1909.
Misattributed
Variant: I am only one, but I am one. I can not do everything, but I can do something. I must not fail to do the something that I can do.

Statement published in A Year of Beautiful Thoughts‎ (1902) by Jeanie Ashley Bates Greenough, p. 172, Third statement for June 11. This has often been misattributed to Helen Keller in some published works since at least 1980, perhaps because she somewhere quoted it.
Variant:
I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything,
I will not refuse to do the something that I can do.
The Book of Good Cheer : A Little Bundle of Cheery Thoughts‎ (1909) by Edwin Osgood Grover, p. 28; also in Masterpieces of Religious Verse (1948) by James Dalton Morrison, p. 416, where it is titled "Lend a Hand"
Variant: I am only one, but still I am one. I cannot do everything, but still I can do something; and because I cannot do everything, I will not refuse to do something that I can do.

"Friendly, and Just a Bit Creepy: St. Vincent Defies Categories" in The New York Times (7 May 2009) http://www.nytimes.com/2009/05/07/arts/music/07vince.html?_r=1&ref=arts&pagewanted=all
Context: I think anyone who is creative or self-aware in any way, there’s like a humility to it, or I should say a humiliation to it. But there’s also a self-delusion — the provisional ego, as my uncle would call it. The self-delusion is the thing that makes you go, oh you know what, all the music that I’ve ever loved in the world, I want to be a part of that — hey, listen to what I have to say, it’s really important, it’s going to matter.”
You can’t apologize your way into people’s hearts... You have to go full force.

"Entertainment or Education? (1936)
Context: The theater-goer in conventional dramatic theater says: Yes, I've felt that way, too. That's the way I am. That's life. That's the way it will always be. The suffering of this or that person grips me because there is no escape for him. That's great art — Everything is self-evident. I am made to cry with those who cry, and laugh with those who laugh. But the theater-goer in the epic theater says: I would never have thought that. You can't do that. That's very strange, practically unbelievable. That has to stop. The suffering of this or that person grips me because there is an escape for him. That's great art — nothing is self-evident. I am made to laugh about those who cry, and cry about those who laugh.

Source: The Picture of Dorian Gray

#165
Vectors: Aphorisms and Ten Second Essays (2001)

Quoted in W. Lyon Blease, "Suvorof," 1926.