Two persons who have chosen each other out of all the species with a design to be each other's mutual comfort and entertainment have, in that action, bound themselves to be good-humored, affable, discreet, forgiving, patient, and joyful, with respect to each other's frailties and perfections, to the end of their lives.
In a way, this kind of insight or recognition often permeates the way I think of character, how I plot action, and the way in which I use imagery, seeing binaries as false.