לְפָנָיו֙ אָ֣כְלָה אֵ֔שׁ וְאַחֲרָ֖יו תְּלַהֵ֣ט לֶֽהָבָ֑ה כְּגַן־עֵ֨דֶן הָאָ֜רֶץ לְפָנָ֗יו וְאַֽחֲרָיו֙ מִדְבַּ֣ר שְׁמָמָ֔ה וְגַם־פְּלֵיטָ֖ה לֹא־הָ֥יְתָה לּֽוֹ׃
A fire devoureth before them, And behind them a flame blazeth; The land is as the garden of Eden before them, And behind them a desolate wilderness; Yea, and nothing escapeth them.
Read kabbalistic (mystical) interpretation of Joel 2:3: and classical mystical sources.