Dr. Michael Horton wrote this article after he was interviewed about Joel Osteen on 60 Minutes.
"Name it, claim it"; the "health-and-wealth" or "prosperity gospel" : these are nicknames for a heresy that in many respects is only an extreme version of perhaps the most typical focus of American Christianity today more generally. Basically, God is there for you and your happiness. He has some rules and principles for getting what you want out of life and if you follow them, you can have what you want. Just "declare it" and prosperity will come to you. God as Personal Shopper.
Although explicit proponents of the so-called "prosperity gospel" may be fewer than their influence suggests, its big names and best-selling authors (T. D. Jakes, Benny Hinn, Joel Osteen, and Joyce Meyer) are purveyors of a pagan worldview with a peculiarly American flavor. It’s basically what the sixteenth century German monk turned church reformer Martin Luther called the "theology of glory": How can I climb the ladder and attain the glory here and now that God has actually promised for us after a life of suffering? The contrast is the "theology of the cross": the story of God’s merciful descent to us, at great personal cost, a message that the Apostle Paul acknowledged was offensive and "foolish to Greeks." . . .
Read the whole thing here.