In contrast to Arminianism, moderate Calvinism demonstrates that there is strong biblical, theological, and historical support for the doctrine of eternal security. In distinction from the implication of strong Calvinism, moderate Calvinism shows that a believer can have real assurance that they are among the elect, that the issue is not his faithfulness but God's. Moderate Calvinists reject the view that there is security for the elect but no assurance that one is of the elect unless he endures.
In this regard, it is ironic that Arminians are more "Calvinistic" than Calvinists, for Arminianism holds that a believer can have assurance that he is now saved even if he does not have security that he will ultimately be saved. By contrast, moderate Calvinism holds that we can have both present assurance and eternal security.
There's really four positions on the subject of eternal security. They are:
Strong Calvinism: believe in the security of the elect. Nevertheless, they cannot, at present, be absolutely sure that they are among the elect. Each person, it is argued, can only prove his or her election by persevering to the end.
Moderate Calvinism: hold that they are eternally secure and can be presently sure of it. Hence, they claim to have both eternal security and present assurance.
Classical Arminianism: those who believe salvation can be lost are called Arminians. They are divided into two basic camps: Classical Arminians, who follow Jacob Arminius (1560-1609), and Wesleyan Arminians, who follow John Wesley (1703-1791). Classical Arminians maintain that a saved person can lose salvation but only by the sin of apostasy-a complete denial of Christ. Once someone has apostasized, he can never be saved again.
Wesleyan Arminians argue that salvation can be lost through any serious intentional sin.
Most of us evangelicals hold to moderate calvinism. Though the discussion is lengthy, there are many arguments in favor of eternal security, along with present assurance, for all believers.
According to the Bible, God's grace of salvation is not bestowed automatically or unilaterally on sinners but is received only through faith. Paul is careful to qualify how God's gracious provision of eternal life is received: "It is by grace you have been saved, through faith-and this not from yourselves, it is the gift of God" (Eph. 2:8).
Saving faith involves true repentance (Acts 1'7:30-31; 20:21; cf.19:4), and true repentance in a saved and spiritually reborn person will naturally lead to good works (Matt. 3:8;Acts 26:20).
But true believers can fall into sin. These believers who fall into sin and fail to avail themselves of God's grace receive His discipline as His children. Hebrews tells us: "The Lord disciplines those he loves, and he punishes everyone he accepts as a son". True believers can "backslide" (Jer. 3:14 NKJV) or be "overtaken in any trespass" (Gal. 6:l NKJV) or commit "sins" (1 John 1:8-9). David did and he paid dearly (2 Sam. 12). Lot, who lived in Sodom, was "a righteous man" (2 Pet. 2:7), but he fell into sin, as did Noah, a great man of faith (Gen. 9).
Likewise, Abraham, "the father of many nations," was beset by deceit and unbelief (Gen. 20-21). In the New Testament, even John the Baptist, the herald of the Messiah, had his doubts (Luke 7:19), but Jesus said he would be in the kingdom of God (Matt. 11:ll). Peter, who denied the Lord three times, did not lose his salvation (John 21:15-19; cf. Matt. 2634-36). Paul speaks of "carnal" believers (1 Cor. 3:1, 3 KJV); indeed, the Corinthian church as a whole was living in various kinds of sin, yet Paul addressed them as "saints" (1:2 KJV). Even the believer who committed incest was rescued (5:5). Of course, not all Christians will receive rewards in heaven (3:12-14); some will be saved "as through fire" (v. 15 NKJV.).
No believer gets away with sin: "We must all appear before the judgment seat of Christ, that each one may receive what is due to him for the things done while in the body, whether good or bad" (2 Cor. 5:10).
God deeply loves us and if we will but have a soft heart toward Him and commit our life to God seeking first the kingdom of heaven and asking to be used by God we certainly shall have eternal riches at the end of this life.
Real repentance is a good thing. It is something Christians do regularly. Repentance is not just an isolated act that is performed when one initially comes to God. Repentance is ongoing (2 Cor. 7:8 ff.). Feel free to ask God to forgive you if you sin and turn away from it with His help.
Deliverance and recovery is still another discussion. Peace and God bless you.