תְּחִלַּ֣ת חָ֭כְמָה יִרְאַ֣ת יְהוָ֑ה וְדַ֖עַת קְדֹשִׁ֣ים בִּינָֽה׃
דער אָנהײב פֿון חכמה איז מורא פֿאַר גאָט, און די דערקענונג פֿון דעם הײליקן איז פֿאַרשטאַנדיקײט.
Duties of the Heart
He said: "Do not be overly wise", since wisdom has a fixed limit which cannot be crossed. The explanation is that all the various branches of wisdom which lead to the service of G-d, guarding His commandments, or demonstrating His wisdom and power - this category is permitted to us, and it is our duty to investigate it, as written: "Behold, the fear of the L-ord is wisdom" (Iyov 28:28), and "The fear of the L-ord is the beginning of wisdom: and the knowledge of the holy ones (good deeds/traits) is understanding" (Mishlei 9:10), which means knowledge of G-d, and also: "The fear of the L-ord is the beginning of wisdom" (Tehilim 111:10), and "The wise men are ashamed, they are dismayed and taken; lo, they have rejected the word of the L-ord; and what wisdom is in them?" (Yirmiyahu 8:9), and all that is a wisdom outside of this way we mentioned - it is forbidden to study it and investigate after it. Therefore he said: "do not be overly wise".