הַע֤וֹד הַזֶּ֙רַע֙ בַּמְּגוּרָ֔ה וְעַד־הַגֶּ֨פֶן וְהַתְּאֵנָ֧ה וְהָרִמּ֛וֹן וְעֵ֥ץ הַזַּ֖יִת לֹ֣א נָשָׂ֑א מִן־הַיּ֥וֹם הַזֶּ֖ה אֲבָרֵֽךְ׃ (ס)
is the seed yet in the barn? yea, the vine, and the fig-tree, and the pomegranate, and the olive-tree hath not brought forth—from this day will I bless you.’ .
Read Jewish philosophy on Haggai 2:19: Rambam's Guide for the Perplexed, Saadia Gaon, and classical Jewish philosophical sources, free online.