Why God is allowing Satan to have power to interfere with his creations?

By allowing Satan to bring a measure of hardship upon us, God has given each of us the opportunity to furnish our personal answer to Satan's challenge. (Proverbs 27:11) There was a moral issue involved. Satan had called into question the rightfulness of Jehovah's way of ruling. In his wisdom, God allowed time to pass so that it could be proved that independence from him brings disaster.