'Boxes' are our compartmentalized lives& their drives. Drives activated by tanha(craving). In meeting the edges of our boxes as they arise, meeting with metta-karuna etc. these edges can dissolve.
The ‘measureless’ domains of goodwill are based on disengagement from ill will, fear and desire. Defense against harm changes to protecting the beautiful heart from confused reactions.
Becoming a ‘true individual’ occurs when goodwill and sharing take the lead over ‘personal obsession’ and programs based on fear and desire. ‘Sharing blessings’ is a skillful meditation.