I have read all the replies, but the bottom line is simple: regardless of one's behavior one still goes to heaven.
And yet how can a person even have eternal security since there is no way in this world of knowing ehrthwr or not the faith was sufficient to merit salvation and heaven??
You don’t understand eternal security.
Eternal security is not based upon a person’s knowing, but instead based upon what God does.
The Holy Spirit is the seal of the New Covenant. A Covenant is a binding contract between man and God, that God designed. God is legally bound by His Covenant that He has made with us and we are given the indwelling Holy Spirit as part of our inheritance as adopted children of God. We are literally made part of God’s family and are co-heirs with Christ to the Father as well as individual heirs of Christ.
Eternal security, once you understand the nuances of the New Covenant and what we are given, is that as long as we have the Holy Spirit, we are God’s.
In theory, because God cannot break His Covenant with us, the Holy Spirit would have to leave the individual and no longer reside in them because the Covenant is sealed in the Holy Spirit.
I will try to add verses to this on my computer as I am on my phone now and to copy and paste Bible verses is too difficult.
UPDATE: Got on my pc and here are some verses.
2 Corinthians 1:21-22
21 Now
it is God who establishes both us and you in Christ. He anointed us,
22 placed His seal on us, and put His Spirit in our hearts as a pledge of what is to come.
2 Corinthians 5:5
5 And God has prepared us for this very purpose and has
given us the Spirit as a pledge of what is to come.
Ephesians 1:13-14
13 And in Him you were
sealed with the promised Holy Spirit, having heard and believed the word of truth, the gospel of your salvation.
14 The Spirit is the pledge of our inheritance until the redemption of those who are God’s possession, to the praise of His glory.
Ephesians 4:30
30 And do not grieve the Holy Spirit of God,
in whom you were sealed for the day of redemption.
John 6:27
27 Do not work for the food that perishes, but for the food that endures to eternal life, which the Son of Man will give to you. For on him God the Father has set his seal.”
Timothy 2:19
19 But God’s firm foundation stands,
bearing this seal: “
The Lord knows those who are his,” and, “Let everyone who names the name of the Lord depart from iniquity.”
Romans 8:16-17
1
6 The Spirit Himself testifies with our spirit that we are God’s children. 17And if we are children, then we are heirs: heirs of God and co-heirs with Christ—if indeed we suffer with Him, so that we may also be glorified with Him