Commentators explain that the 'fatness of thy house' and 'river of thy pleasures' are metaphors for God's overwhelming provision. This isn't a small meal or a trickle of water; it's a rich feast and an overflowing, inexhaustible river. Whether this 'house' is seen as the church, public worship, or heaven itself, the promise is that those who trust in God will find their deepest needs completely and abundantly met.