Revelation 13:7,8

The beast made war with the saints to overcome them, and all shall worship him whose names are not written in the book of life. All the wiles of the Devil and the power of the persecutor will not cause the true Christian to sink into apostasy. He endures to the end. He is faithful unto death. The name that is written in the Lamb's book of life will never be blotted out. See John 10:28-29.

These words were written to those who lived in the midst of some of these persecutions. It would encourage them in facing the struggle to know that God would not suffer them to be overcome. And it is equally as good a lesson today. "The soul that on Jesus hath leaned for repose. He'll never, no never, desert to his foes. That soul though all hell should endeavor to shake, He'll never, no never, no never forsake."