Have you ever wondered whether or not the Once Saved Always Saved teaching in some Christian circles is according to the Bible? If that’s the case, this video is for you! It presents biblical evidence that shows we need to keep our faith and hope in Jesus Christ to the end, always we can end up lost. Yes, we can lose our salvation. OSAS, also called Eternal Security, was introduced into Christianity by John Calvin, a 16th century Protestant Reformer. Followers of Calvin’s teachings are called Calvinists and his system of theology is called Calvinism.