Balance of Emotions

On page 369, Godfrey says: "An accomplished leader in the tradition of Finney can easily manipulate emotions in worship, particularly through preaching and music. An effective preacher can create emotions ranging from reverence to sorrow, from joy to a tangible sense of power."

While I understand the danger of manipulating emotions, I'm wondering how Godfrey would balance this out? Obviously good preaching should stir a response from the hearer, just as good worship should stir emotion based on what one is hearing.