Eternal security, also known as "once saved, always saved," is the belief that from the moment anyone becomes a Christian, they will be saved and will not lose salvation. Once a person is truly "born of God" or "regenerated" by the indwelling of the Holy Spirit, nothing in heaven or earth "shall be able to separate (them) from the love of God" (Romans 8:39), and thus nothing can reverse the condition of having become a Christian. Is this true? Hebrews 6:4-6 is a major proof text either way.