Ellen White saw Christianity as affecting every part of a person's daily life. The core of practical Christianity is exhibiting Jesus' character (self-sacrificing love) rather than living by the principles of Satan's kingdom (self-seeking). It means not only the dropping of harmful habits and destructive ways of living, but incorporating the positive characteristics of Christ's character in service to God and to one another. "No one can love God and not love His children," she wrote. "Christ abiding in the soul exerts a transforming power, and the outward aspect bears witness to the peace and joy that reign within" (Selected Messages, book 1, p. 337).