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From the yt info:

Mercedes Sosa canta Gracias a la Vida - Letra de Violeta Parra

Gracias a la Vida que me ha dado tanto
me dio dos luceros que cuando los abro
perfecto distingo lo negro del blanco
y en el alto cielo su fondo estrellado
y en las multitudes el hombre que yo amo.

Gracias a la vida, que me ha dado tanto
me ha dado el oido que en todo su ancho
graba noche y dia grillos y canarios
martillos, turbinas, ladridos, chubascos
y la voz tan tierna de mi bien amado.

Gracias a la Vida que me ha dado tanto
me ha dado el sonido y el abedecedario
con él las palabras que pienso y declaro
madre amigo hermano y luz alumbrando,
la ruta del alma del que estoy amando.

Gracias a la Vida que me ha dado tanto
me ha dado la marcha de mis pies cansados
con ellos anduve ciudades y charcos,
playas y desiertos montañas y llanos
y la casa tuya, tu calle y tu patio.

Gracias a la Vida que me ha dado tanto
me dio el corazón que agita su marco
cuando miro el fruto del cerebro humano,
cuando miro el bueno tan lejos del malo,
cuando miro el fondo de tus ojos claros.

Gracias a la Vida que me ha dado tanto
me ha dado la risa y me ha dado el llanto,
asi yo distingo dicha de quebranto
los dos materiales que forman mi canto
y el canto de ustedes que es el mismo canto
y el canto de todos que es mi propio canto.

Gracias a la Vida
Gracias a la Vida
Gracias a la Vida
Gracias a la Vida

Translate to English:

Mercedes Sosa - Thanks to life or Thanks Giving(Violeta Parra)

Thanks to life (Thanks Giving), which has given me so much.
It gave me two beams of light, that when opened,
Can perfectly distinguish black from white
And in the sky above, her starry backdrop,
And from within the multitude
The one that I love.

Thanks to life, which has given me so much.
It gave me an ear that, in all of its width
Records— night and day—crickets and canaries,
Hammers and turbines and bricks and storms,
And the tender voice of my beloved.

Thanks to life, which has given me so much.
It gave me sound and the alphabet.
With them the words that I think and declare:
"Mother," "Friend," "Brother" and the light shining.
The route of the soul from which comes love.

Thanks to life, which has given me so much.
It gave me the ability to walk with my tired feet.
With them I have traversed cities and puddles
Valleys and deserts, mountains and plains.
And your house, your street and your patio.

Thanks to life, which has given me so much.
It gave me a heart, that causes my frame to shudder,
When I see the fruit of the human brain,
When I see good so far from bad,
When I see within the clarity of your eyes...

Thanks to life, which has given me so much.
It gave me laughter and it gave me longing.
With them I distinguish happiness and pain—
The two materials from which my songs are formed,
And your song, as well, which is the same song.
And everyone's song, which is my very song.

Thanks to life (Thanks Giving)
Thanks to life
Thanks to life
Thanks to life

Oh, and length 5:29. Now I have to watch again to catch what she said after the song!

The duration of this video has been updated from unknown to 5:29 - length declared by oritteropo.

*quality

Boosting this quality contribution up in the Hot Listing - declared quality by oritteropo.

Thanks for posting this, I had only heard Violeta's version which is very haunting.
Pura Vida.