"All of us to some degree live around the truth of the gospel but do not ‘get’ it. So the key to continual and deeper spiritual renewal and revival is the continual re-discovery of the gospel. A stage of renewal is always the discovery of a new implication or application of the gospel - seeing more of its truth.”
-- Tim Keller, “The Centrality of the Gospel”
This is why the gospel must be central in our teaching and preaching and why it must be preached and taught every time we gather. Because every day we may forget its scandal and we are constantly tempted to live ambivalent about its goodness.