The principle is to think the best of a person, to think the best of all persons, and to have their best interests at heart. But this is a complicated question as it is very difficult to judge if I have their best interest at heart when I don't have the same opinion or action as you, and you, of course have their best interest at heart. Either one of us could be trying but get it wrong, or we could both get it right, different rights. I don't know how to stand to show I am thinking the best of them when you think I don't. It is a bit like proving a negative.