I like to think that the song does have a more spiritual meaning but as some said he could be referring to a girl who has really strong feelings towards him or someone else who loves him. When you really love someone you will do anything to please them and you would put your life at risk to save them which is basically what he is saying this person would do, but he doesn't put as much into their relationship as this person does and he is trying to be more loving towards this person.
I like to think that the song does have a more spiritual meaning but as some said he could be referring to a girl who has really strong feelings towards him or someone else who loves him. When you really love someone you will do anything to please them and you would put your life at risk to save them which is basically what he is saying this person would do, but he doesn't put as much into their relationship as this person does and he is trying to be more loving towards this person.