I just read a classic trump nugget. He states that you shouldn’t look into yourself too deeply, because you might find things you don’t want to see.
And then you might find there’s a reason for your weaknesses that you don’t want to see. And once you know the reason and weaknesses, other people can in principle figure that out too. Once they can figure you out, you’re in big trouble.
Basically, according to Trump: stay mysterious to yourself so as to remain a mystery to others.
That way no one knows what to expect, not even you.