I think that line refers to his physical father. Any man has the capability to be a father; daddy implies affection and warmth. His mom is telling him (and his bothers) that the man that helped bring them into the world, is not their dad, simply their "father." However, in the same line he addresses his mom as "mother" - just thought of that. God can be called Daddy as well, He is personal too.
The line:
"But I believe there is something here to be learned of grace, 'cause I can't help but love you"
is awesome. It parallels God's love to us - we can love simply because He loved us first (because He chose to).
I think that line refers to his physical father. Any man has the capability to be a father; daddy implies affection and warmth. His mom is telling him (and his bothers) that the man that helped bring them into the world, is not their dad, simply their "father." However, in the same line he addresses his mom as "mother" - just thought of that. God can be called Daddy as well, He is personal too.
The line: "But I believe there is something here to be learned of grace, 'cause I can't help but love you" is awesome. It parallels God's love to us - we can love simply because He loved us first (because He chose to).