כֹּ֥ה אָמַ֖ר יְהוָ֣ה צְבָא֑וֹת שְׁאַל־נָ֧א אֶת־הַכֹּהֲנִ֛ים תּוֹרָ֖ה לֵאמֹֽר׃
’Thus saith the LORD of hosts: Ask now the priests for instruction, saying:
Read Jewish philosophy on Haggai 2:11: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.