Having countless reviews by people who claim to have been healed as a result of reading this book and applying Henry Wright's principles and teachings, I can't say that the author is completely wrong.
At the same time, this book is extremely poorly written and the author fails to rightly divide. While Mr. Wright denies being affiliated with a denomination, he is clearly associated with the Pentecostal Cult, which is known for its emphasis on casting out devils, faith healing, and other miracles mentioned in Mark 16.
Henry Wright purposefully takes Scriptures out of context to "prove" his points. The Scriptures he uses do nothing to prove what he tries to teach. He claims that some diseases are caused by a demonic spirit and that we should cast out spirits. Except casting out demons is NOT something we can do as members of the Body of Christ. Mark 16 is frequently used by Pentecostals to push their cult beliefs, but Mark 16 isn't even about today. It was for the Apostles only!
Even if Henry Wright was completely correct, good health and healing should certainly not be the main focus as Christians. While many have seemed to benefit from this book and his teachings, Henry Wright overly simplifies disease, claiming that disease is caused by sin and that God's perfect will is that you don't get sick.
Apparently, he has never read Genesis 3:19, where God promises death upon every man due to Adam's sin. God doesn't always heal, because if He did, nobody would ever die. If every disease could be cured just by repenting of sin, then nobody would ever die!
In summary, while Henry may have certain points and has definitely helped people, this book is complete junk. Avoid it.
Our ultimate focus as saved believers should be the Gospel and Salvation, not physical health. While health is important, it is far more important to preach the Gospel and get people saved. After all, Jesus Christ warned in Luke 12:4 to not fear those that kill the body but cannot destroy the soul, but rather fear God, who can send us to Hell, a punishment we all deserve!
Disease can wreck your body, that's for sure. But if you are saved, you are promised eternal life in Heaven (John 3:16-18). If you trust in the blood of Christ to pay for your sins, you don't have to face the Second Death (1st Corinthians 15:57).
Even if Henry Wright's teachings were correct, they shouldn't be our focus. Given how centered his ministry is on healing and health, I highly doubt whether he was saved or not. I write this review nearly 2 years after his death from heart disease. What is far more important than healing is salvation from Hell and eternal damnation.
Why doesn't Henry Wright ever warn about that? About Hell? About eternal damnation? Why doesn't he speak more about salvation?
The answer is simple: He wants money. Or rather, he wanted money. If he preached sound Biblical truth, he would be hated by many and he wouldn't have his popularity.
Not to mention that his "ministry" outright ignores God's Word by allowing his wife to be a pastor.