Jehovah's Witnesses believe their religion is a restoration of first-century Christianity. Doctrines of Jehovah's Witnesses are established by the Governing Body, which assumes responsibility for interpreting and applying scripture. The Governing Body does not issue any single, comprehensive "statement of faith", but prefers to express its doctrinal position in a variety of ways through publications published by the Watch Tower Society. Their publications teach that doctrinal changes and refinements result from a process of progressive revelation, in which God gradually reveals his will and purpose, and that such enlightenment or "new light" results from the application of reason and study, the guidance of the holy spirit, and direction from Jesus Christ and angels. The Society also teaches that members of the Governing Body are helped by the holy spirit to discern "deep truths", which are then considered by the entire Governing Body before it makes doctrinal decisions. The religion's leadership, while disclaiming divine inspiration and infallibility, is said to provide "divine guidance" through its teachings described as "based on God's Word thus ... not from men, but from Jehovah."