Context is everything:
1 John 5:14-21 NASB
This is the confidence which we have before Him, that, if we ask anything according to His will, He hears us. And if we know that He hears us in whatever we ask, we know that we have the requests which we have asked from Him. If anyone sees his brother committing a sin not leading to death, he shall ask and God will for him give life to those who commit sin not leading to death. There is a sin leading to death; I do not say that he should make request for this.
All unrighteousness is sin, and there is a sin not leading to death. We know that no one who is born of God sins; but He who was born of God keeps him, and the evil one does not touch him. We know that we are of God, and that the whole world lies in the power of the evil one. And we know that the Son of God has come, and has given us understanding so that we may know Him who is true; and we are in Him who is true, in His Son Jesus Christ. This is the true God and eternal life. Little children, guard yourselves from idols.
Indeed, context is everything, but that context is the totality of Sacred History, which means not only that the words do not stand alone, but that the books do not either, and the books do not stand apart from from the story of the people of God, nor this entirely from the whole human experience.