מִקְצֵ֤ה הַשָּׁמַ֨יִם ׀ מֽוֹצָא֗וֹ וּתְקוּפָת֥וֹ עַל־קְצוֹתָ֑ם וְאֵ֥ין נִ֝סְתָּ֗ר מֵֽחַמָּתוֹ׃
它從天這邊出來，繞行到天那邊；沒有一樣能躲開它的熱力。
Pirkei Avot
Rabbi Eliezer Hisma said: the laws of mixed bird offerings and the key to the calculations of menstruation days, these are the body of the halakhah. The calculation of the equinoxes and gematria are the desserts of wisdom.