Eccl 3:7

“In words about things concerning God, when the discussion is about his being, that is the "moment for keeping silent." But when it is about some good activity [of God], of which the knowledge reaches down even to us, then is the moment for speaking of the powers, to proclaim the wonders, to recount the works, to use language thus far. In matters that lie beyond, it is the moment not to allow the creation to overstep its boundaries but to be content to know itself.”

“When it to comes to words about God and searching his essence there is a time for silence, but when it concerns some good operation of which we have knowledge, it is time to speak of God's power, miracles and works which necessitate words. A creature should not overstep its bounds with regard to transcendent matters but remain content with knowledge of himself.”

“Ought we to be dumb? Certainly not. For "there is a time to keep silence and a time to speak." If, then, we are to give account for an idle word, let us take care that we do not have to give it also for an idle silence. For there is also an active silence, such as Susanna's was, who did more by keeping silence than if she had spoken. For in keeping silence before others she spoke to God and found no greater proof of her chastity than silence. Her conscience spoke where no word was heard, and she sought no judgment for herself at the hands of men, for she had the witness of the Lord. She therefore desired to be acquitted by the One who she knew could not be deceived in any way. The Lord himself in the gospel worked out in silence the salvation of humankind. David rightly therefore enjoined on himself not constant silence but watchfulness.”

“I believe that the Pythagoreans, whose discipline it was to remain silent for five years and to speak with erudition afterwards, drew their practice from this principle. We too should learn to be silent before opening our mouths to speak. Let us remain still for an established time, meditating on the words of the Teacher, for nothing should seem right to us except what we have learned. In this way, only after much silence will we be made teachers from the disciples. As it is currently, for the sake of those who are falling into the worst wickedness of the world, we daily teach in the churches what we do not know. And if we provoke the people's applause by our choice of words or by the instigation of the devil, who is the patron of errors, we bear witness against our own conscience that we are doing the very thing against which we are able to warn others.”

“The tongue, therefore, should be discreetly curbed, not tied up fast. For it is written, "A wise man will hold his tongue until the time," in order, assuredly, that when he considers it opportune, he may relinquish the censorship of silence and apply himself to the service of utility by speaking such things as are fit. And again it is written, "A time to keep silence and a time to speak." For, indeed, the times for changes should be discreetly weighed, lest either, when the tongue ought to be restrained, it run loose to no profit in words, or, when it might speak with profit, it slothfully restrain itself. Considering which thing well, the psalmist says, "Set a watch, O Lord, on my mouth, and a door round about my lips."”

“Let anyone who loves wisdom, therefore, first beg this from God, then let the humble hearer seek out a teacher of truth, and all the while let him not only most carefully restrain his tongue from idle conversations but also hold back from preaching the very truth which he has recently learned. Hence Solomon, writing about differences of times, says, "There is a time for keeping silence and a time for speaking." Hence the Pythagoreans, who were endowed with the capacity to teach natural knowledge, order their listeners to keep silence for five years and thus at last they allow them to preach. The truth is more safely heard than preached, for when it is heard humility is safeguarded, but when it is preached it is difficult for the preacher to escape some minimal boasting.”

“Regarding the use of garments, he adds: A time to rend, when they are worn out; and a time to sew, because our garments are daily worn out and are not renewed, unless perhaps by a divine miracle, as in Deuteronomy 8: "Your garment with which you were covered has in no way been consumed by age"; but ours are quickly consumed; therefore little care should be given to them: 1 Timothy 6: "Having food and clothing, let us be content with these." Here is set forth the fourth variety of time, which regards the proper manner of conduct, which is considered according to the threefold alternation of acts, namely with respect to the act of the rational power, which is to speak; the concupiscible, which is to love; the irascible, whose act is to wage war; and with respect to their opposites. Therefore, regarding the alternation of speech, he says: A time to be silent and a time to speak, because one should not always speak nor always be silent; Ecclesiasticus 20: "A wise man will be silent until the proper time, but the frivolous and imprudent will not observe the time." For the wise man is silent and speaks at the proper time; hence Proverbs 25: "Golden apples in settings of silver, he who speaks a word in its proper time." And he places silence before speech, because one should speak deliberately: Proverbs 13: "He who guards his mouth guards his soul; but he who is heedless in speaking shall experience evils." Spiritually, again, as to actives: A time to rend and a time to sew, and this with respect to clothing: Job 31: "If I have let the poor go without covering, and if his sides have not blessed me." The fourth variety is considered with respect to prelates, first in teaching, when he says: A time to be silent and a time to teach, because one must first learn and afterward teach; Ecclesiasticus 18: "Before you speak, learn"; Ecclesiasticus 32: "Listen in silence."”

“A brother asked a hermit, 'If I live with other monks, and see something wrong, do you want me to say something about it?' The hermit replied, 'If some are older than you, or your contemporaries, you will have more peace of mind in keeping silent for you will find peace in putting yourself below the others.' The brother said to him, 'How can I do that, abba? For my thoughts would trouble me.' The hermit said to him, 'If you are worrying about the matter, offer a piece of advice, once, with humility. If they do not listen to you, leave what you have done in God's sight, and He will help you. In this way the worshipper of God lays himself before God, and does not follow his self-will. But take care that your anxiety be of God. In any case, as far as I can see, it is good to be silent, for silence is humility.'”