After looking at the lyrics, I believe I have somewhat of an understanding of what this song was written to express. The blackbird represents a side of the person or state of mind that needs to fly away. It's seems like he's talking about how the "weeping willow" with it's shifting characteristics in the wind was used metaphorically to represent this unstable state of mind or state of living. That when the breeze that is out of anyone's control comes over the horizon, let it sweep you away. He also seems to more directly to this state of mind as well as the personality required to endure hard times and negative feelings about where this person is in life and this person's discontent. That that it takes a strong person to stay with a person who's wrecked and jaded and in a place so impure... when he mentions that "the fragile can not endure the wrecked and the jaded, a place so impure. The static of this cruel world cause some birds to fly long before they've seen their day". He goes on to say "Ascend may you find no resistance know that you made such a difference all you leave behind will live to the end. The cycle of suffering goes on but memories of you stay strong someday I too will fly and find you again" which makes me wonder if maybe this is more specifically about someone close committing suicide. If this is the case, the context of the rest of the song tells me that he doesn't resent the person for giving up or flying away from their unhappiness and that he tried to be strong and endure the person's depression or sadness, however the outcome turned out to be. That he did his best to be supportive and that even though he was not successful, he accepts the loss, holds onto the happy memories and remembers that some day he will fly and find this person again. As for the chorus, saying that he hopes the wind carries this person home, tells the blackbird to fly away and never be broken or paralyzed in sadness again. That beyond the suffering the person has known he hopes the person finds their way and will never feel broken again. He repeats this over and over again throughout the song telling me that this is the primary point of writing this song. That it's mainly an expression of acceptance and understanding and wishing the person well in the afterlife.