This preface introduces a book about healing through faith in God. It acknowledges that some Christians doubt God's ability or willingness to heal today. The preface aims to show through testimonies that faith in God can be contagious and stir faith in readers to receive their own miracles. It describes the author's experience with her husband's 16-year struggle with mental illness and medication, and eventual healing through exercising their faith in Christ and divine health. This experience gives the author confidence to write about the power of God to heal permanently where doctors can offer no cure.