Therefore, a person should be very careful with speech, and should cultivate restraint in speaking, except with regard to matters of knowledge or things that are necessary for his physical welfare.
On this point, the sage Rabbi Shimon ben Gamliel said, “I did not find anything better for one’s person than silence; … and whoever engages in excessive talk brings on sin.”
Similarly, when speaking about matters of knowledge, one’s words should be brief, but rich in content and focused. In contrast, if one’s words are many and the content scant, that is foolishness, about which it is stated, “The dream comes with a multitude of subjects, and the voice of the fool with a multitude of words.” Likewise, Rabbi Akiva said, “Silence is a safeguard for wisdom.”
Therefore, one should not hasten to answer, nor speak at length. If he is a teacher, he should teach his students in calm and tranquility, without shouting or wordiness. This is what Solomon stated: “The words of the wise are heard in tranquility.” (Seven Gates of Righteous Knowledge by Rabbi Moshe Weiner and Dr. Michael Schulman, Ask Noah International, 2017, p 98)