אָגִ֥ילָה וְאֶשְׂמְחָ֗ה בְּחַ֫סְדֶּ֥ךָ אֲשֶׁ֣ר רָ֭אִיתָ אֶת־עָנְיִ֑י יָ֝דַ֗עְתָּ בְּצָר֥וֹת נַפְשִֽׁי׃
I will be glad and rejoice in Thy lovingkindness; For Thou hast seen mine affliction, Thou hast taken cognizance of the troubles of my soul,
Read kabbalistic (mystical) interpretation of Psalms 31:8: and classical mystical sources.