In ancient law, there was an underlying reticence to part with property. The new owner then took control by a series of symbolic gestures. He either built and settled the property, walked around the property, donned the seller's cloak, or broke a twig off a tree on the property. At a later time, presumably more sophisticated jurists would feel the need to express these processes more abstractly, but the sensuous aspect of law did not die easily and is still with us in expressions like habeas corpus and other concrete remnants of antiquity. A word of caution.
Language hides as well as reveals.
But this can be misleading, for the word twb often has little to do with moral attributes. In legal contexts it can express either the notion of satisfaction or the notion of joy. The only way to determine this is by position and context. Position determines meaning. The philological method is also concerned with parallel structures.