In Section 12 of Mosibat Nameh, Attar of Nishapur explores the profound virtue of silence (khamushi) and the extreme difficulty of maintaining it. While acquiring speech requires immense knowledge and wisdom, a far greater, boundless intellect is needed to remain silent. Attar warns that sharing spiritual secrets with others is dangerous because listeners often fail to understand, and those who do may act out of envy. He emphasizes extreme caution by noting that even walls have ears, advising that if one must speak their secrets to a wall, they should speak them to the wall of the grave (diwar-e lahad), highlighting death as the ultimate keeper of secrets and the final place of peace.