In The Great Gatsby, what do we learn about Gatsby's dream-future in his ledger in his copy of Hopalong Cassidy?

It is important to think of how this revelation about
Gatsby's youth and how he set himself to make a success of his life ties in with the
novel's presentation of the American Dream. The American Dream dictates that anyone can
make a success of themselves through hard work. Through Gatbsy's notes he made, it can
be seen how totally he believed this, and how he shaped his life to be aimed towards
success and making money. Note how his father interprets this
note:

Jimmy
was bound to get ahead. He always had some resolves like this or something. Do you
notice what he's got about improving his mind? He was always great for that. He told me
I et like a hog once, and I beat him for
it.

Thus we can understand
more about the course that Gatsby set himself on from an early age. However, being given
this information now only serves to heighten the pathos of Gatbsy's death, as we see
that while he may have gained some of the trappings of success, his real goal or aim,
which was Daisy, was never attained, and it was his pursuit of the unpursuable that
ironically resulted in his death.