suffer You > do You permit

5 So long unwreaked, of Your enemy?

unwreaked > unavenged

6 Or have You, Lord, of good men's cause no heed?

cause > case, suit; cause

7 Or does Your justice sleep, and silent lie? 8 What boots then the good and righteous deed,

boots > avails [one]

9 If goodness find no grace, nor righteousness no meed?

nor > (The double negative is intensive) meed > reward

311.10