What does Les mean by 'believing'?

Les explains that believing is not merely a mental agreement or a casual statement that Christ died for him. He contrasts it with church membership, baptism, communion, tithing, and good works, noting that those things, while in their rightful place, have nothing to do with salvation. Using the illustration of a dead car battery receiving power from jump cables or a generator, Les teaches that the gospel is the power of God unto salvation. So when he speaks of believing, he means totally entrusting our eternal destiny to the Word of God and to the power of the gospel. He does not accept the idea of simply saying, 'Yeah, I believe that Christ died for me.'