In a large group of individuals one finds people, some of whom are wise, knowledgeable and understand science, some who are naïve and lacking in knowledge, and some who are average. You can see that the Torah spoke of four sons. Should a speaker address the public with profound words, appropriate for the wise, the person will discover that the rest of the group is wasting its time. And this cannot be. And should the person choose the other option, and speak in the simple terms appropriate for most people, the group of wise people will be wasting its time. On this matter, King Solomon, may he rest in peace, said "The lips of the righteous sustain many." It is known that the definition of a righteous person is one who gives to each his due, as the master instructs, and this is how it is possible for a person to lead many: by knowing to give each and every faction what it requires. Those, indeed, whose sight is limited and do not distinguish whom they are addressing will at times tire the public with their words, causing useless damage and loss, and at times will speak simple words before the wise, and be mocked.