Reward incentive motivation permeates our society. People respond to rewards just like little puppies do. Some parents think only in terms of rewarding their children, and, they even reward them for being bad. When a parent says to a little child, "If you will quit throwing a temper tantrum, we will go get an ice cream as soon we get away from the doctor's office," he is rewarding bad behavior and the child quickly understands how to get what he wants. The "in thing" now in many churches is to offer physical rewards for being religious. That ranges from the "gospel of health and wealth" that says, "If you give $100, God will give you $1,000," to appealing to the fleshly appetites of entertainment to get people to come to "church."
Whatever happened to doing right because it is right? Surely, Jesus offers men rewards but those incentives have nothing to do with the sensual desires. In fact, he condemned those who followed him because they were fed -- "Labor not for the meat which perisheth, but for that meat which endureth unto everlasting life,"(John 6:29). The reward for righteousness is eternal life with God. God expects right behavior, because he is holy and we must be like him to share in spiritual life(1 Peter 1:15-16).
Christians are committed to a way of life that is righteous, because it is the right way to live. Sometimes the righteous life may offer a material advantage but that isn't why the Christian lives that way. At other times, being righteous may be a difficult road and the righteous may be mocked and persecuted. The disciple of the Lord does right when people speak well of him and when they do not -- his motivation is doing right, because it is the right thing to do.