Quote
"No young man believes he shall ever die."
"And now I think about it, I never really wanted to live forever. I just want to live well."

Immortality is the concept of eternal life and permanent resistance to death from natural causes. Some species possess "biological immortality" due to an apparent lack of the Hayflick limit.
"No young man believes he shall ever die."
"Soren Kierkegaard, Christian Discourses 1848 Hong 1997 p. 205"
"I long to believe in immortality. I shall never be able to bid you an entire farewell. If I am destined to be happy with you here — how short is the longest life. I wish to believe in immortality — I wish to live with you forever."
"No, no, Im sure, My restless spirit never could endure To brood so long upon one luxury, Unless it did, though fearfully, espy A hope beyond the shadow of a dream."
"Most men live in order to make a living; when they have that, they live in order to make a good living; when they have that, they die. … This comment can be developed into a demonstration of human immortality. This demonstration could be stated as follows: It is the destiny of every human being to make a good living. If he dies before he does that, he has not fulfilled his destiny. … But if he makes a good living, then he has achieved his destiny, but the destiny of making a good living cannot be that he is supposed to die, but, on the contrary, that he is supposed to live well on his good living—ergo, man is immortal."
"I dont want to achieve immortality through my work; I want to achieve immortality through not dying. I dont want to live on in the hearts of my countrymen; I want to live on in my apartment."