כָּל־זֹ֣את בָּ֭אַתְנוּ וְלֹ֣א שְׁכַחֲנ֑וּךָ וְלֹֽא־שִׁ֝קַּ֗רְנוּ בִּבְרִיתֶֽךָ׃
All this is come upon us; yet have we not forgotten Thee, neither have we been false to Thy covenant.
Read kabbalistic (mystical) interpretation of Psalms 44:18: and classical mystical sources.