Something about how Alphonse was the rightest person to fight using a Philosopher's Stone, because he, like the souls in the stone, is separated from his body and most strongly recognizes their experience and humanity and helplessness. He said, "We'll fight together."
Something about how when they commit the taboo, though both brothers had an equal part in it, it was Ed's idea. Ed signed off their research. Al was helping his brother.
Something about how Al sacrifices himself to contain Pride, and how in the end he uses Alkahestry, the healing art, to sacrifice his soul to save his brother's life, giving up everything, using alchemy for a good and selfless end.
Something about what Al says in the epilogue about breaking Equivalent Exchange to give more back, because he's ultimately come to the conclusion that the only thing he wants to do with alchemy is help people. How in his humility he has given himself up for the sake of others, and he would do it again in a heartbeat.
He doesn't lose his alchemy to complete his character arc because alchemy isn't a source of pride for him. It's an amazing tool and philosophy that saved his life, and that's exactly the kind of thing he wants to use it for.
