Proper 12/Pentecost 10/Ordinary Time 17
Preaching The Lectionary Psalms for Cycles A, B, C
(See Proper 19/Pentecost 17/Ordinary Time 24, Cycle C, for an alternative approach.)
This psalm reflects on what Gerhard Von Rad termed "practical atheism." It's not that there are those who decide, intellectually, that God does not exist. Rather, there are those who in their hearts say, "There is no God." The psalmist has in mind those who act and make decisions as though there were no God to hold them accountable. It is entirely possible that there are those who confess with their lips that God is real, but then act is if God does not exist.