In "The Scarlet Ibis," what is the narrator's overall attitude toward life?

Above all, the narrator's attitude to life seems to be
shaped by his own health and well-being, which of course, heightens the contrast between
himself and his younger brother, Doodle, who is defined by his inability to do all the
things that his brother can and wants him to do. Perhaps what most clearly reveals the
kind of attitude that the narrator, the elder brother of Doodle, has concerning life is
in his hopes for a younger brother. Note what the narrator reveals to
us:

I thought
myself pretty smart at many things, like holding my breath, running, jumping, or
climbing vines in Old Woman Swamp, and I wanted more than anything else someone to race
to Horsehead Landing, someone to box with, and someone to perch with in the top fork of
the great pine behind the barn, where across the fields and swamps you could see the
sea. I wanted a
brother.

Therefore the
narrator defines himself as a typical young boy who delights in physical activity and
enjoying life outdoors, playing in nature and getting up to the kind of mischief that
boys of his age normally do. Of course, having a younger brother like Doodle, who is
unable to do all the things that the narrator enjoys doing, seriously embarrasses the
narrator, leading him to try to change his younger brother and to teach him how to do
all the things that he wants Doodle to be able to share with
him.