God could simply exert raw power and snuff Satan out. That would glorify God’s power. But it would not display so clearly the superior worth of Jesus over Satan. That will be displayed as Christ defeats Satan by His death and then by winning allegiance from the saints because of His superior truth and beauty above the ugliness and lies of Satan.
Piper, J. (2004) Life as a Vapor, 67-68
Semper Reformanda 