Eccl 9:17

“"The gentle words of the wise are heard above the shouts of a king over fools. "Whosoever you see in the Church declaiming and arousing applause by whatever refinery or charm, he who shakes off his laughter and incites the crowd to feigned happiness, know that this is a sign of foolishness, equally of him who speaks, and of those who listen to him. For the words of the wise are heard in peace and respectful silence. He who is foolish and is powerful speaks to fools and cannot hear himself because of either the noise of his own voice or that of the applauding crowd.”

“And that the words of the wise man are to be heard, he adds: "The words of the wise are heard in silence," that is, they are worthy to be heard in silence. Ecclesiasticus 32: "Listen in silence, and for your reverence good grace shall come to you"; whence it is also added: "And do not presume to speak in the midst of great men." "More than the cry of a prince among fools," and his speech is more clamorous, because however much a man may cry out, the fool does not pay attention. Ecclesiasticus 22: "He who tells wisdom to a fool speaks with one who is sleeping, and at the end of the narration he says: 'Who is this?'" That wisdom therefore is despised, this is on account of the foolishness of the hearers; therefore Matthew 7: "Do not give what is holy to dogs." And the reason for this is given by the Apostle in 1 Corinthians 2: "The natural man does not perceive the things that are of the Spirit of God."”