In his practice Dr. Carrigan witnessed Christians suffer and die with ravaging and devastating diseases. As an historian, he was aware of the untold suffering humanity has endured, at times at its own hand and even at times in the name of God. He has personally suffered the death of his wife, son and grandson, and the near deaths of his other son and his self in separate accidents.

He asked God why He has allowed such suffering in his people, the question asked by millions over the centuries of human history.

In "God's Purpose in Creation", The author sets forth a theological explanation based on God's ultimate plan and perfect will for his church and his permissive will at work in our lives today.