Rom 8:30, Phil 1:6, 1 Thess 5:24, 1 Cor 1:7-9
God is faithful. (Deut 7:9)
Deut 7:9 But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.
God has decided to save us and justifies and glorifies us. (Romans 8:30)
Romans 8:30 Moreover whom he did predestinate, them he also called: and whom he called, them he also justified: and whom he justified, them he also glorified.
God works good works for those who believe in Jesus as the Christ, until the day of Christ Jesus. (Phil 1:6, 1 Thessalonians 5:24)
Phil 1:6 Being confident of this very thing, that he which hath begun a good work in you will perform it until the day of Jesus Christ:
1 Thessalonians 5:24 Faithful is he that calleth you, who also will do it.
Jesus, the Christ, also establishes us to the day of Christ. (1 Corinthians 1:7-9)
1 Corinthians 1:7 So that ye come behind in no gift; waiting for the coming of our Lord Jesus Christ: 8 Who shall also confirm you unto the end, that ye may be blameless in the day of our Lord Jesus Christ. 9 God is faithful, by whom ye were called unto the fellowship of his Son Jesus Christ our Lord.