I have heard that your name can be blotted out of the Book of Life. Is this true? I have found several verses that say our name can never be erased but am still searching for the verse that proves otherwise (if there is one).
You are thinking of Revelation 3:5 (see Rev. 17:8; 20:12; and 21:27). This passage involves a stern warning to Christians in Sardis that they must be faithful to Christ until the end of their life, even if that means martyrdom. The warning reminds us that we are not eternally secure until we are securely in eternity. We must rely on God’s grace every day to remain faithful until the end. Apostasy is a possibility for Christians, and so this passage warns against it.
—Ben Witherington III