The purpose of this book is to indicate the Natural Principles governing the relation between Mental Action and Material Conditions.
Mental Science is one of the earliest New Thought paths. It emphasizes personal development as the vehicle to awaken ones' latent abilities. The New Thought movement is a movement which developed in the United States in the 19th century. It holds that Infinite Intelligence, or God, is everywhere, spirit is the totality of real things, true human selfhood is divine, divine thought is a force for good, sickness originates in the mind, and "right thinking" has a healing effect.

Thomas Troward was an English author whose works influenced the New Thought Movement and mystic Christianity.