Grey area

"There is no need to tell someone who already knows; and there is no point in telling the one who does not know already. Thus silence is the best", the Zen saying goes. A senior friend once commented to that, "He must have been a lazy teacher!" Another one, "The most profound statements are often said in silence." or "usually talkers don't do much and doers don't talk much" We love these kinds of absolute conclusions. They have a profound appeal to them. But the truth is not a black and white phenomenon. It always hides in the details of the grey area. I think it can be only seen through the context in which it is applied on a case by case basis.