What is the meaning of "Ta'amah [Ki Tov Sachrah]"?
Rashi (31, according to the Mashal): Torah's speech.
Malbim (Derech ha'Muskal): In addition to perfecting herself, she does business. She strives to perfect others both in investigation and deed. Then, merit of the Rabim is attributed to her. She has a share in all that they profit, for she caused it. This is like a merchant who profits. This is the best merchandise, for it is constant profit.
Why does her lamp not extinguish at night?
Rashi (31, according to the Mashal): "Va'Laylah" is written Chaser without a Hei (like Leil), to hint to Leil Shimurim on which the Egyptians were stricken (Makas Bechoros), and the Torah illuminated for Yisrael and protected them.
Malbim (Derech ha'Muskal): Also after death, his lamp will illuminate amidst darkness. The Mitzvos that will be fulfilled through him and the Halachos said in his name will make his lamp illuminate - "Ner Mitzvah v'Sorah Or" (6:23), forever.
