(ה) יוֹסֵי בֶן יוֹחָנָן אִישׁ יְרוּשָׁלַיִם אוֹמֵר, יְהִי בֵיתְךָ פָתוּחַ לִרְוָחָה, וְיִהְיוּ עֲנִיִּים בְּנֵי בֵיתֶךָ, וְאַל תַּרְבֶּה שִׂיחָה עִם הָאִשָּׁה. בְּאִשְׁתּוֹ אָמְרוּ, קַל וָחֹמֶר בְּאֵשֶׁת חֲבֵרוֹ. מִכָּאן אָמְרוּ חֲכָמִים, כָּל זְמַן שֶׁאָדָם מַרְבֶּה שִׂיחָה עִם הָאִשָּׁה, גּוֹרֵם רָעָה לְעַצְמוֹ, וּבוֹטֵל מִדִּבְרֵי תוֹרָה, וְסוֹפוֹ יוֹרֵשׁ גֵּיהִנֹּם:
(5) Yose ben Yochanan, man of Jerusalem, says, "May your home be open wide, may the poor be members of your household and do not increase conversation with the woman." They so stated with his wife; all the more so with the wife of his friend. From this, the sages said, "Any time that a man increases conversation with the woman, he causes evil to himself and neglects the words of Torah; and, in his end, he inherits Geihinam."
Even when you speak with others about the wisdom of the Torah, silence is still preferable. Silent contemplation offers greater possibilities for connection with the Divine than does discussion or speech.
-- R. Dov Baer of Mezrich, trans. R. Or Rose & R. Ebn Leader
(יג) רַבִּי עֲקִיבָא אוֹמֵר, שְׂחוֹק וְקַלּוּת רֹאשׁ, מַרְגִּילִין לְעֶרְוָה. מָסֹרֶת, סְיָג לַתּוֹרָה. מַעַשְׂרוֹת, סְיָג לָעשֶׁר. נְדָרִים, סְיָג לַפְּרִישׁוּת. סְיָג לַחָכְמָה, שְׁתִיקָה:
(13) Rabbi Akiva says: Joking and lightheartedness acclimate toward promiscuity. Tradition is a safeguarding fence around Torah. Tithes are a safeguarding fence around wealth. Vows are a safeguarding fence around abstinence. A safeguarding fence around wisdom is silence.
Souls on Fire (Wiesel, trans. Wiesel), chapter 1
[The Baal Shem Tov] wanted to know everything, understand everything. Each of his disciples was convinced that the Master saw no-one but him. One day, says legend, his disciples understood that in his eyes they were all equal -- and "they remained silent a long time."