“If I gave it all up immediately, I'd lose my immortality. I've put in so many enigmas and puzzles that it will keep the professors busy for centuries arguing over what I meant, and that's the only way of insuring one's immortality.”
Joyce's reply for a request for a plan of Ulysses, as quoted in James Joyce (1959) by Richard Ellmann
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James Joyce 191
Irish novelist and poet 1882–1941Related quotes

“That I shall love always,
I argue thee
that love is life,
and life hath immortality”

As quoted in "Constance Wu Doesn’t Want to Be Your “It” Girl" in Vulture https://www.vulture.com/2016/06/constance-wu-c-v-r.html

“I am not at all interested in immortality, only in the taste of tea.”
From Lu Tong (also spelled as Lu Tung)
Misattributed

" That Nature is a Heraclitean Fire and of the Comfort of the Resurrection http://www.bartleby.com/122/48.html", lines 22-24
Wessex Poems and Other Verses (1918)

The Tragic Sense of Life (1913), III : The Hunger of Immortality
Context: I am dreaming...? Let me dream, if this dream is my life. Do not awaken me from it. I believe in the immortal origin of this yearning for immortality, which is the very substance of my soul. But do I really believe in it...? And wherefore do you want to be immortal? you ask me, wherefore? Frankly, I do not understand the question, for it is to ask the reason of the reason, the end of the end, the principle of the principle.
“Only the good die young, so I’m destined to be immortal, I guess.”
Source: Fire with Fire (2013), Chapter 16 (p. 206)

J'ai vraiment, un vrai bagage dans la tête. S'il y avait pour cela, comme il y a partout ici, des compagnies d'assurance, voilà un ballot je ferais assurer de suite.
Quote from a letter to James Tissot, (New Orleans, 1873), as cited in Marilyn Brown, Degas and the Business of Art: A Cotton Office in New Orleans (Penn State Press, 1994)
1855 - 1875