I'm not

I’m not a tree,
even though I have branches.
I’m not an ocean,
even though I am mystery.
I’m not… even though I am.
I’m not a song,
even though I’m melodic.
I’m not a poem,
even though I am letters.
I’m not… even though I am.
I’m not my father,
even though I have love.
I’m not a bird,
even though I can fly.
I am not what I’m not, but I am…