the belief that sick people can be cured using the power of prayer and religious belief, or the process of trying to cure people like this

Despite all the advances in modern medicine, demand for alternative therapies and faith healing keeps growing. 尽管现代医学取得了种种进步，但是对替代疗法和信仰疗法的需求仍在不断增长。

Because of his upbringing, he was open to faith healing. 因为自己的成长经历，他对信仰疗法持开放态度。