That we are all imperfect or flawed is obvious and a truism. One deeper understanding of it is: there are times when we are helplessly dependant on others, and there will be times when the vice versa is true. This is often true with a significant other. We should let this be, instead of trying to be tough and independent and not allowing oneself to be 'at the mercy' of others. Being dependant or vulnerable is a passing thing, and you can be sure that the tables will be turned at some point.