Not just a shell, but a fruit meant to be devoured is what he thinks of her heart.
He longed to carve her heart and feelings like it was a jack-o'-lantern.
Only interested again when she married another man and forgot about his discarded feelings.
But the light does not belong to him, but to God.
She gave her love to the man who the knight felt treated her with kindness, not flattering words due to his cheating tongue.
The bride lights up the night and chases the shadowy places.
Like the ten virgins, there was plenty of oil gifted to her if she retrieved it before dark. For the bride married a friend of light, and her ex fell into his own pit of darkness and used his own heart as a lantern, but fake love shows no light, so he waited.