עַד־אָ֣נָה יְ֭הוָה תִּשְׁכָּחֵ֣נִי נֶ֑צַח עַד־אָ֓נָה ׀ תַּסְתִּ֖יר אֶת־פָּנֶ֣יךָ מִמֶּֽנִּי׃
How long, O LORD, wilt Thou forget me for ever? How long wilt Thou hide Thy face from me?
Read kabbalistic (mystical) interpretation of Psalms 13:2: and classical mystical sources.