“The body is never more alive than when it is dead; but it is alive in its units, and dead in its totality; alive as a congeries, dead as an organism.”

Source: Dead and Alive

On Literature, Revolution, Entropy and Other Matters (1923)
Context: It is an error to divide people into the living and the dead: there are people who are dead-alive, and people who are alive-alive. The dead-alive also write, walk, speak, act. But they make no mistakes; only machines make no mistakes, and they produce only dead things. The alive-alive are constantly in error, in search, in questions, in torment.
The same is true of what we write: it walks and it talks, but it can be dead-alive or alive-alive. What is truly alive stops before nothing and ceaselessly seeks answers to absurd, "childish" questions. Let the answers be wrong, let the philosophy be mistaken — errors are more valuable than truths: truth is of the machine, error is alive; truth reassures, error disturbs. And if answers be impossible of attainment, all the better! Dealing with answered questions is the privilege of brains constructed like a cow's stomach, which, as we know, is built to digest cud.

Variant: Almost dead yesterday, maybe dead tomorrow, but alive, gloriously alive, today.
Source: Lord of Chaos

On getting old.
What It Is (2009)

Source: My Sister's Keeper

Zareef, Adil Saturday, (January 28, 2006) The Demise of a Dream. The Daily Times https://archive.is/20130416144347/www.dailytimes.com.pk/print.asp?page=2006%5C01%5C28%5Cstory_28-1-2006_pg7_35

The Hunger (1981)

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Saint Genet, Actor and Martyr (1952)