How does Les like to summarize the gospel in one phrase?
The gospel is summarized in one phrase as the finished work of the cross. This body of truth centers on Christ crucified, buried, and risen, with His shed blood implied. That finished work opens our Red Sea and delivers us from Satan's power, and salvation comes by believing plus nothing.
Les explains that the gospel is the body of truth he usually concentrates by saying 'the finished work of the cross.' He points to 1 Corinthians 15:1-4, where Paul says by the gospel you are saved: Christ was crucified, buried, and rose from the dead. Implied in His death is the shed blood. That finished work opens our Red Sea and takes us away from the power of the Egyptian army behind us, or the power of Satan. After believing, nothing else is added—no baptism, church membership, or any 'blah, blah, blah'—because Christ has done it all.