This lot means "事無絕對". It warns the parties concerned not to be too subjective. People tend to stick strongly to their own well-meaning ideas and arguments and think that this is the right thing to do. It is certainly admirable to have good intentions as a starting point, but one should not be too stubborn in "choosing the good. Everyone sees and interprets things differently. If the goal is good intentions, the methods are diverse and not necessarily limited to one. While adhering to one's principles, one should be open-minded, receptive, and learn from different ways of doing things and opinions. Too much paranoia will narrow you down and cause antagonism among others. As the saying goes, "Believers are always in harmony with the world," so there is no need to be too demanding and cause trouble.