Wealtheow becomes the sacrificial balance between the Scyldings and the Helmings, just as the Libra represents balance and order. She brings order between the two feuding tribes.
Self Sacrificial Love: Hygmod offers his sister and renames her "Wealtheow, or holy servant of common good." Wealtheow is willing to give herself to Hrothgar, even though she is leaving her family and people behind. She knowingly does this if only to stop the useless feuding between the two peoples.
Self Sacrificial Love cont: Jesus sacrificed Himself to save the souls of all people. "For God so loved the world that He gave his only Son and that whoever believes shall not perish, but shall have eternal life." John 3:16