Revelation 3:5 Explained
Revelation 3:5 says, "He that overcometh, the same shall be clothed in white raiment; and I will not blot out his name out of the book of life, but I will confess his name before my Father, and before his angels." This verse has been used to again justify a faith plus works salvation and the type two legalism which requires good works to stay saved. Again, if that were true Ephesians 2:8-9 would be lying and if Ephesians 2:10 were "plus works" then Ephesians 2:8-9 would be a lie. So while the works salvation crowd says it means a Christian could lose their salvation and be blotted out, however it is quite the opposite.
1 John 5:5-13 should explain it all on who is the overcomer against sin and Satan- they who believe that Jesus Christ is the Son of God. However it does not remain to just believing that Jesus Christ is the Son of God. James 2:19 says that the devils believe that there is one God and tremble. It's not merely believing that Jesus Christ is the Son of God. It boils down to this that they not only believe that Jesus Christ is the Son of God but they also trust Him alone for salvation. 1 John 5:13 says one can know for sure whether or not they are truly saved. So by this, when a person trusts the Lord Jesus Christ for who He is and what He did, they are the overcomer. In his own strength, man is not an overcomer and the power to overcome sin is by the grace of God. Of course, 1 John 1:8-9 should still come to mind because of the old nature.
So in short, the Lord Jesus Christ promised in Revelation 3:5 that to whosoever is His will be clothed in His righteousness and that person will NEVER be blotted out. That would also come in harmony to John 6:37 that says, "For whosoever cometh unto Me, I shall NO WISE CAST OUT." Romans 8:38-39 says, "For I am persuaded, that neither death, nor life, nor angels, nor principalities, nor powers, nor things present, nor things to come, nor height, nor depth, nor any other creature, shall be able to separate us from the love of God, which is in Christ Jesus our Lord." That is, salvation is already secure even if a person may stumble.
However this does not give any license to sin as the works salvation preachers would accuse a fundamental Christian of because God's grace grants power over sin (Ephesians 2:8-10, Titus 2:11-15) and that God will still chastise the stumbling believer (Hebrews 12:5-6). Christians are destined to endure to the end by God's grace and not of themselves.