[Update] I have been getting a lot of hits on the “quote from into the wild” posts — the ones like this that are just a quote without my personal context of the book and movie… So I am going to put in links to my posts on:
Now what is history? It is the centuries of systematic explorations of the riddle of death, with a view to overcoming death. That’s why people discover mathematical infinity and electromagnetic waves, that’s why the write symphonies.. Now, you can’t advance in this direction without a certain faith. You can’t make such discoveries without spiritual equipment. And the basic elements of this equipment are in the Gospels. What are they? To begin with, love of one’s neighbor, which is the supreme form of vital energy. Once it fills the hear of man it has to overflow and spend itself. And then two basic ideals of modern man — without them he is unthinkable — the idea of free personality and the idea of life as sacrifice.
Boris Pasternak, Doctor Zhvago.
(McCandless underlined love of one’s neighbor, free personality, and life as sacrifice — I’ve used red and bold here.)