'Key to the Science of Theology' is Parley P. Pratt's all-inclusive account of religion's impact on every aspect related to life. Pratt discusses religion, science, and the meaning of life in a passionate and concise way. Pratt's insights into the importance of religion and the presence of the Holy Ghost in our lives has lost none of its poignant luster with the passage of time. We discover answers to all manner of questions concerning the dizzying pace of scientific advancement, and the core spiritual principles which all good Christians must cleave to in pursuit of a sublime life well-lived. All kinds of philosophical concepts are brought to the fore by Pratt, whose learning and researches are of stunning profundity. Topics include the spiritual progress of mankind over the ages, the various attributes of the heavenly afterlife, and the origin and destiny of the universe around us.