Halakhah su Geremia 23:29

In order to unveil the divine ideal in this world, revelation must occur through two complementary facets. Every individual creature is limited, and therefore cannot grasp divine perfection, but the people of Israel as a collective allows divine perfection to be manifest in the world. This indicates the tremendous importance of a unified Israel, because only the Jewish people, in all its components, can receive the Torah and with it rectify the world. Just as there is a difference between souls, so do the words of the Torah have multiple meanings, as it is written: “God said one thing from which I have heard two” (Tehilim 62:12) and: “Indeed, My word is like fire, like a hammer shattering rock” (Yirmiyahu 23:29). The Sages extrapolate, “Just as this hammer fragments into sparks, so too each and every statement that came from God’s mouth refracts into seventy languages” (Shabbat 88b). “Just as this hammer is divided into many fragments, so one verse of scripture generates many meanings (Sanhedrin 34a). Likewise, it is said about the disagreements between Beit Hillel and Beit Shamai, and all other rabbinic disputes, “These and those are the words of the living God” (Eruvin 13b).

A nida (a woman who has menstruated and not yet purified herself by going to the mikveh) is obligated to recite all the berakhot and prayers and may study Torah, for words of Torah cannot become impure, as it is written: “Indeed, My word is like fire” (Yirmiyahu 23:29). Just like fire cannot become impure, the words of Torah do not contract impurity (Berakhot 22a).

Therefore every man should increase his guarding. And if upon running into a beautiful woman, a man will think that Gehinnom is open between her eyelids and that any who approaches her will burn in a perpetual fire, and review his thoughts about these things, 'it will not be a cause of stumbling for him.' And they, may their memory be blessed, said (Berakhot 5a) that if [he] does not have the power in his hand to kill the impulse and to distance its thought from him, he should recite the reading of Shema or involve himself with Torah [study]. And they informed us that it will die with this in any event - as they, may their memory be blessed, said (Kiddushin 31a), "If it is a stone it will dissolve, and if it is iron, it will explode, as it is stated (Jeremiah 23:29), 'Is My word not thus, like fire, etc.'"