The Psalms explore themes of suffering, judgement, good and evil. 

However, it is possible this is due to such things being an almost universal part of human experience. The lesson this week asks us to consider how Psalm 67 might inform our understanding of the role of God's people in end times. At first glance it seems more interested in telling us about the role of God himself, and it is possible that the application to God's people might be more timeless.