When one talks about the perseverance of the saints, it doesn't mean that we say a little prayer when we're a kid, then when we grow up we just go and do whatever we want to, and live a life of drunkenness and promiscuity, and expect to stand before GOD and be declared righteous.
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Perseverance of the Saints
It follows from what was just said that the people of God WILL persevere to the end and not be lost. The foreknown are predestined, the predestined are called, the called are justified, and the justified are glorified. No one is lost from this group. To belong to this people is to be eternally secure.
But we mean more than this by the doctrine of the perseverance of the saints. We mean that the saints will and must persevere in the obedience which comes from faith. Election is unconditional, but glorification is not. There are many warnings in Scripture that those who do not hold fast to Christ can be lost in the end.
The following seven theses summarize our understanding of this crucial doctrine.
Our faith must endure to the end if we are to be saved.
This means that the ministry of the word is God's instrument in the preservation of faith as well as the begetting of faith. We do not breathe easy after a person has prayed to receive Christ, as though we can be assured from our perspective that they are now beyond the reach of the evil one. There is a fight of faith to be fought. We must endure to the end in faith if we are to be saved.
l Corinthians 15:1,2, "Now I would remind you, brethren, in what terms I preached to you the gospel, which you received, in which you stand, by which you are saved, if you hold it fast--unless you believed in vain."
Colossians 1:21-23

2 Timothy 2:ll,l2, "The saying is sure: If we have died with him, we shall also live with him; if we endure, we shall also reign with him..."
Mark 13:13

See also Revelation 2:7

Obedience, evidencing inner renewal from God, is necessary for final salvation.
This is not to say that God demands perfection. It is clear from Philippians 3:l2,l3 and l John 1:8-10

Hebrews 12:14

Romans 8:l3, "If you live according to the flesh you will die, but if by the Spirit you put to death the deeds of the body, you will live."
Galatians 5:l9-2l, "Now the works of the flesh are plain: immorality, impurity, licentiousness, idolatry, sorcery, enmity, strife, jealousy, anger, selfishness, dissension, party spirit, envy, drunkenness, carousing, and the like. I warn you, as I warned you before, that those who do such things shall not enter the kingdom of God." (See also Ephesians 5:5

l John 2:3-6




John 8:3l









God's elect cannot be lost.
This is why we believe in eternal security--namely, the eternal security of the elect. the implication is that God will so work that those whom he has chosen for eternal salvation will be enabled by him to persevere in faith to the end and fulfill, by the power of the Holy Spirit, the requirements for obedience.
Romans 8:28-30

John 10:26-30


There is a falling away of some believers, but if it persists, it shows that their faith was not genuine and they were not born of God.
l John 2:19


The fact that such a thing is possible is precisely why the ministry of the Word in every local church must contain many admonitions to the church members to persevere in faith and not be entangled in those things which could possibly strangle them and result in their condemnation.
God justifies us on the first genuine act of saving faith, but in doing so he has a view to all subsequent acts of faith contained, as it were, like a seed in that first act.
What we are trying to do here is own up to the teaching of Romans 5:l, for example, that teaches that we are already justified before God. God does not wait to the end of our lives in order to declare us righteous. In fact, we would not be able to have the assurance and freedom in order to live out the radical demands of Christ unless we could be confident that because of our faith we already stand righteous before him.
Nevertheless, we must also own up to the fact that our final salvation is made contingent upon the subsequent obedience which comes from faith. The way these two truths fit together is that we are justified through our first act of faith because God sees in it (like he can see the tree in an acorn) the embryo of a life of faith. This is why those who do not lead a life of faith with its inevitable fruit of obedience simply bear witness to the fact that their first act of faith was not genuine.
The textual support for this is that Romans 4:3





God works to cause his elect to persevere.
We are not left to ourselves and our assurance is very largely rooted in the sovereign love of God to perform that which he has called us to do. l Peter 1:5, "By God's power we are guarded through faith for a salvation ready to be revealed in the last time." Jude 24


l Thessalonians 5:23-24

Philippians 1:6

l Corinthians 1:8-9, "Jesus Christ will sustain you to the end; guiltless in the day of our Lord Jesus Christ. God is faithful, by whom you were called into the fellowship of his Son, Jesus Christ our Lord."
Therefore we should be zealous to make our calling and election sure.
2 Peter 1:10

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By John Piper. © Desiring God. Website: www.desiringGod.org. Email: mail@desiringGod.org. Toll Free: 1.888.346.4700.