כִּֽי־אַתָּ֤ה ׀ אֱלֹהֵ֣י מָֽעוּזִּי֮ לָמָ֪ה זְנַ֫חְתָּ֥נִי לָֽמָּה־קֹדֵ֥ר אֶתְהַלֵּ֗ךְ בְּלַ֣חַץ אוֹיֵֽב׃
For Thou art the God of my strength; why hast Thou cast me off? Why go I mourning under the oppression of the enemy?
Read kabbalistic (mystical) interpretation of Psalms 43:2: and classical mystical sources.