Two very significant quotes come from Chris's personal writings. In the first one, he had just buried his possessions in order to prevent theft and mentions that not having a camera means that he cannot take pictures to document his experiences.
It is the experiences, the memories, the great triumphant joy of living to the fullest extent in which real meaning is found. God it's great to be alive!
This quote shows the influence of transcendentalism on Chris's life, and the appeal of his personal ideals; without the material pictures or a concrete method of recording his life, Chris can focus entirely on his memories, which can become greater with time. A picture can bring back memories of how real and physical experiences are, while memories can become almost mythical.
The second quote comes from a sheet of plywood on which Chris scratched what might be a personal creed. The last lines show his determination, his defiance of societal norms, and his joy at being able to live his dreams:
no longer to be poisoned by civilization he flees, and walks alone upon the land to become lost in the wild.
alexander supertramp MAY 1992
([sic] Krakauer, Into the Wild, Amazon.com)
Both these quotes share Chris's desire for isolation and personal growth through self-denial; they also show that he was absolutely committed to his goals. He tended to write about himself in the third-person, and might have been intending to convert his journals into a book later on.