The book of Hebrews is a message of warning. The admonition to "hold fast" to one's profession is found three times in Hebrews. The admonition was to hold fast to the better hope, better testament, better covenant, better promises, better thing, a better and enduring substance. They were warned not to forsake this new and better way. This booklet is an exegesis of a key passage concerning those who may forsake the new and better way. For those of us who believe in the possibility of personal apostasy, Hebrews 6:4-6 is obviously one of the most important passages. It ranks right along with Hebrews 10:26-29 and 2 Peter 2:20-22 not to mention several other signi¿cant passages-as providing the basis for our teaching on the subject. The purpose of this book is to present a thorough exegesis of this passage and to treat questions about how it relates to the possibility that a truly regenerate person may "fall from grace." One thing all Christians ought to be able to agree on-whether on this doctrine or not-is that all our teaching should be based on what the Bible has to say and not on traditional philosophical-theological arguments. My aim, then, is to determine exactly what Hebrews 6:4-6 teaches.