Mend or end
This proverb suggests that when a relationship or situation is broken, it is important to either fix it or end it altogether. It emphasizes the importance of addressing problems instead of ignoring them.
The important thing about the two methods are not similar but opposite; between mending and ending that is not a difference of degree but of vital antagonism of kind. Mending is based upon the idea that the original nature of a thing is good; ending is based upon the idea that the original nature of a thing is bad or at least, has lost all power of being good.
Relationships are tricky. Deciding whether or not to end a relationship can be even harder. Relationships, whether they be romantic in nature or friendships, are complicated. And sometimes, deciding whether a relationship should be severed, or if it's worth salvaging is even trickier.