Other supporting verses on the elect of God. The elect are chosen in Christ from the foundation of the earth. The certainty of God's saving His people to the uttermost those who come to Him is firmly established abundantly by scripture. The elect were given by God to His Son, the Lord knows those who are His and none can say Jesus is Lord except by the Holy Spirit and God dealt, has given to each one in His body the measure of their faith, Paul making the comment for none to think more highly of himself than he ought since faith is God's gift, salvation is not of yourself lest any should boast.
God only gives faith to His people, the everyone among you points this out.
Romans 12:3
3 For I say, through the grace given to me, to everyone who is among you, not to think of himself more highly than he ought to think, but to think soberly, as God has dealt to each one a measure of faith.
His saints will be faithful, all others will fall away.
John 6
65 And He said, “Therefore I have said to you that no one can come to Me unless it has been granted to him by My Father.”
66 From that time many of His disciples went back and walked with Him no more. 67 Then Jesus said to the twelve, “Do you also want to go away?”
68 But Simon Peter answered Him, “Lord, to whom shall we go? You have the words of eternal life. 69 Also we have come to believe and know that You are the Christ, the Son of the living God.”
Paul here is boldly proclaiming these truths in his letter to the saints-believers.
Ephesians 1New King James Version (NKJV)
Greeting
1 Paul, an apostle of Jesus Christ by the will of God,
To the saints who are in Ephesus, and faithful in Christ Jesus:
2 Grace to you and peace from God our Father and the Lord Jesus Christ.
Redemption in Christ
3 Blessed be the God and Father of our Lord Jesus Christ, who has blessed us with every spiritual blessing in the heavenly places in Christ,
4 just as He chose us in Him before the foundation of the world, that we should be holy and without blame before Him in love,
5 having predestined us to adoption as sons by Jesus Christ to Himself, according to the good pleasure of His will,
6 to the praise of the glory of His grace, by which He made us accepted in the Beloved.
7 In Him we have redemption through His blood, the forgiveness of sins, according to the riches of His grace 8 which He made to abound toward us in all wisdom and prudence, 9 having made known to us the mystery of His will, according to His good pleasure which He purposed in Himself, 10 that in the dispensation of the fullness of the times He might gather together in one all things in Christ, both which are in heaven and which are on earth—in Him. 11 In Him also we have obtained an inheritance, being predestined according to the purpose of Him who works all things according to the counsel of His will, 12 that we who first trusted in Christ should be to the praise of His glory.
Revelation 17:7-8New King James Version (NKJV)
The Meaning of the Woman and the Beast
7 But the angel said to me, “Why did you marvel? I will tell you the mystery of the woman and of the beast that carries her, which has the seven heads and the ten horns. 8 The beast that you saw was, and is not, and will ascend out of the bottomless pit and go to perdition. And those who dwell on the earth will marvel, whose names are not written in the Book of Life from the foundation of the world, when they see the beast that was, and is not, and yet is.