Keep silence for the most part, and speak only when you must, and then briefly.
A minister asked a little boy how to get to the Post Office. After the little boy told him, the minister said, Why don't you come to church tonight? I'm giving instructions on how to get to heaven. After thinking a minute, the boy replied, I don't think so. You don't even know how to get to the Post Office.
To us, men of the West, a very strange thing happened at the turn of the century; without noticing it, we lost science, or at least the thing that had been called by that name for the last four centuries. What we now have in place of it is something different, radically different, and we don't know what it is. Nobody knows what it is.