The next appeal that Charles Koller speaks of in his book entitled How to Preach Without Notes is The appeal to Aspiration. This is the hunger of both “spiritual happiness” and “completeness.”
Koller uses the story of both the Thief on the cross and the rich young ruler. The Thief on the cross told Jesus to “remember him in the Kingdom.” (Luke 23:42) The Rich young Ruler said “What lack I yet?” (Matt 19:20.) In both cases the characters longed for a completeness that they sensed Jesus could give to them.
In our preaching of the gospel, we must have in our aresenal the appeal to aspiration in addition to other appeals. There is in all of us an incompleteness that only God can satisfy. As a preacher we can tap into that longing.