In the pre-final episode: episode 63 - The Other Side of the Gateway, why didn't Elric use the following options:
Ling gives the philosopher's stone to retrieve his brother. The reason Edward gives is the promise that he and his brother made. But alphonse uses the philosophers stone in the battle against pride and kimblee. This implies desperate times, desperate measures have to be taken. Moreover, the philosophers stone is already made by sacrificing lives and there is no way to change that, so why not just use it?
His father, Van Hohenheim offers his life. The reason Edward gives is that he is not willing to sacrifice a life for another. This seems like a good and right thing to do, but in just a couple of scenes later, Van Hohenheim dies, so why not just use his life to get back Alphonse as he is anyways going to die.
It is just depressing to see Edward sacrificing his alchemy.