This booklet was developed from an article written by the author in his Educational Encyclopedia of Islam. Briefly but convincingly it presents evidences in favor of Gods existence while refuting arguments against it from a rational point of view. It goes on to correct many erroneous concepts concerning Him, which have served over time to weaken peoples faith. This small book is expected to become a handy reference for Muslims and non-Muslims alike who are engaged in efforts to revive firm belief in God.