[bvcvbuiy]

You should try reading All men are mortal by Simone de Beauvoir : https://en.wikipedia.org/wiki/All_Men_Are_Mortal

It is about a man who becomes immortal and experiences a lot of things. Without spoiling you, it turns out not to be as great as expected.

Apart from this there is the somewhat classical : "A famous quote tells us the three things every man should do during his time on earth: Plant a tree, have a son and write a book. The reason behind this quote is generally believed to be that we are only here for a short time and these three things will live on long after we have passed. It’s like leaving a legacy and in a sense achieving a kind of immortality."