כִּֽי־רַבּ֤וּ פְשָׁעֵ֙ינוּ֙ נֶגְדֶּ֔ךָ וְחַטֹּאותֵ֖ינוּ עָ֣נְתָה בָּ֑נוּ כִּֽי־פְשָׁעֵ֣ינוּ אִתָּ֔נוּ וַעֲוֺנֹתֵ֖ינוּ יְדַֽעֲנֽוּם׃
For our transgressions are multiplied before Thee, And our sins testify against us; For our transgressions are present to us, And as for our iniquities, we know them:
Read Kabbalistic (mystical) interpretations of Isaiah 59:12: Zohar and classical Jewish mystical sources, free online.