In addition, Paul says if any man speaks contrary to the words of Jesus Christ and the doctrine of Godliness, they are proud and know nothing (1 Timothy 6:3-4).
And James says God resists the proud and gives grace to the humble (James 4:6).
Titus 1:16 says you can deny God by a lack of works.
Hebrews 5:9 says that Jesus is the author of salvation to all those who obey Him.
1 Corinthians 16:22 says,
"If any man love not the Lord Jesus Christ, let him be Anathema Maranatha."
Yet, Jesus says,
"If you love me, keep my commandments" (John 14:15).
Philippians 4:3 says,
"And I entreat you also, true yokefellow, help those women who labored with me in the gospel, with Clement also, and with other of my fellow laborers, whose names are in the book of life."
In this verse, we understand that the laborers in Christ (not those believers who do not labor) are the type of saints that have their names written in the book of life. This is important to understand because God's Word says elsewhere,
"His lord said unto him, Well done, good and faithful servant; thou hast been faithful over a few things, I will make thee ruler over many things: enter thou into the joy of thy lord." (Matthew 25:23).
But what of the unprofitable servant?
Well, the Bible says,
"And cast ye the unprofitable servant into outer darkness: there shall be weeping and gnashing of teeth." (Matthew 25:30).
Revelation 3:5 says,
"He that overcomes, the same shall be clothed in white clothing; 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"
In this verse we understand that person who overcomes, the Lord will not be blot out his name from the book of life. Jesus will confess his name before His Father and before His angels.
But is there a scenario where Jesus will
not confess a person's name before the Father? Yes, Jesus also says,
"Whosoever therefore shall be ashamed of me and of my words in this adulterous and sinful generation; of him also shall the Son of man be ashamed, when he cometh in the glory of his Father with the holy angels." (Mark 8:38).
This is in context to Jesus also saying, "For whosoever will save his life shall lose it; but whosoever shall lose his life for my sake and the gospel's, the same shall save it. For what shall it profit a man, if he shall gain the whole world, and lose his own soul?" (Mark 8:35-36).
Also, we understand from Revelation 3:5 that he that overcomes shall be clothed in white clothing, too. What does Scripture say about this?
Revelation 19:8 says,
"And to her was granted that she should be arrayed in
fine linen,
clean and
white: for the
fine linen is the
righteousness of saints."
Here in this verse we see that the fine linen that is on the saints represents the
righteousness of the saints.
What is one way the Bible describes righteousness?
"Little children, let no man deceive you: he that doeth righteousness is righteous, even as he is righteous" (1 John 3:7).
So doing righteousness makes one righteous according to John.
Now, why is it important to know that the "bride" (Revelation 19:7) has on fine linen that represents the righteousness of the saints? (Revelation 19:8). Well, the Parable of the Wedding Banquet tells us that those who do not have on a wedding garment (Which is a picture of the righteousness of the saints) will be cast into outer darkness where there will be weeping and gnashing of teeth.
12 "And he saith unto him, Friend, how camest thou in hither not having a wedding garment? And he was speechless.
13 Then said the king to the servants, Bind him hand and foot, and take him away, and cast him into outer darkness, there shall be weeping and gnashing of teeth." (Matthew 22:12-13).
Gnashing of teeth is what wolves do.
See this image here by clicking on the following spoiler button:
Anyways, in conclusion so far:
It is very clear that Sanctification (holy living) is a necessary part of salvation.
...