"The hope in hearing the old, good news is that it would perpetually break new ground in our lives. Our hearts are like a jungle. There is untamed wilderness and darkness that has not yet been brought, as it were, under the rule of the One who has laid claim to it all.
We need to hear the gospel again and again so that the old, good news of Jesus Christ would reach into these unchartered territoties of our lives and fly the flag of its dominion. This is how we are "being saved." This is what it means to be overcome by the gospel."
From Jonathan Parnell at Desiring God