In a marriage- it should be based on a word: LOVE
Later... followed with CARE, COMPANIONSHIP, and SACRIFICING.
it should be based on a goodwill too.
do not give up easily;
although it had a limit.
and the most difficult one is to notice when the limit is broken and when we need to give it up.
when a finger poonted at me, i was drowning and need so much time to bounced back.