It’s about the fight between a man and his conscience, even if conscience is everything we are, even if we always have to obey our conscience.
It’s about the fight between Andrews and his father, Andrews’ fight against the memory of his father and against his father inside himself.
Love is what makes Andrews aware of the correspondence between his person and his conscience, which is not alien, is not “the man within”, the other himself. The other himself is his father, and in order to be safe he has only to obey his conscience, his real himself.
We’re all made by a steady struggle between our two selves , and voice that whispers in our ear is our soul, is what we really are.