In "The Scarlet Ibis", what initiation/rite of passage did the main character, Brother/Doodle's brother, go through?

In "The Scarlet Ibis", Brother went through the right of passage of death.  He experienced the death of his brother, Doodle. Brother also experienced, with this death, that he was not infallible.  Brother had to face the truth that his love for his brother was overshadowed by his pride and arrogance.

Brother was a young man involved in his handicapped brother's life because their parents insisted that Brother take care of Doodle.  Brother loved his younger brother, but did not accept him.  Brother was prideful, arrogant, and overbearing.  He wanted to push Doodle to achieve more and more.  Yet, these achievements were not for Doodle, but for his own desire not to be teased, poked and prodded about being with a "handicapped" kid all the time.