20 And because it is believed that he is to arrive at so great a pitch of empty glory, and he will be permitted to do so great things, both against all men and against the Saints of God, that then some weak ones shall indeed think that God cares not for human affairs, the Psalmist interposing a diapsalma, adds as it were the voice of men groaning and asking why judgment is deferred.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)