I feel like this is about his son before he was born. That the writer didn't care which way his life turned out except he wanted, "hell or glory/ I don't want anything in between." Then, he suddenly had, "a baby boy with long eyelashes" on the way, and he had much more to care about.
He seems to be contemplating the fact that his life and the type of person he is counts to someone other than himself, his son. ("daddy (he)said you gotta show the world the thunder). He seems to understand that when his son is born, each moment of his life is going to come together, "when the two collide/it's no coincedence". Everything matters, and he wants to show that to his son.