I fully agree with all "The Watchers" comments and wish to add the following.
The problem here with many exponents of unconditional eternal security appears to be a reliance on human “logic & wisdom” more so than what scripture teaches. Or taking Scripture out of context. Perhaps they are trying to salve their own conscience. This popular belief has inspired many to think that they can attend church on Sunday have their sins forgiven then go and commit the same sins again. It is the cause of much Apostasy in the “Christian” church. I fear they are in for a shock on the Day of Judgement. They make the same error that the Jews have made. They think Just because they are the seed of Abraham they are Eternally Secure. Yes they are chosen but it’s conditional on them having Faith and abiding in God’s Commands to them. For the Christian it is the same, we are to abide in Him in faith with His Law in our hearts.
Rom. 11:20-23 reads;
20 Well said. Because of unbelief they were broken off, and you stand by faith. Do not be haughty, but fear.
21 For if God did not spare the natural branches, He may not spare you either.
22 Therefore consider the goodness and severity of God: on those who fell, severity; but toward you, goodness, if you continue in His goodness. Otherwise you also will be cut off.
23 And they also, if they do not continue in unbelief, will be grafted in, for God is able to graft them in again.
The above shows that some Jews were removed from God’s promises and Christians grafted in, but with the warning that they also can be removed if they fail to continue in the faith.
Ezek.33 11-1 3 reads;
“Say to them: 'As I live,' says the Lord GOD, 'I have no pleasure in the death of the wicked, but that the wicked turn from his way and live. Turn, turn from your evil ways! For why should you die, O house of Israel?'
"Therefore you, O son of man, say to the children of your people: 'The righteousness of the righteous man shall not deliver him in the day of his transgression; as for the wickedness of the wicked, he shall not fall because of it in the day that he turns from his wickedness; nor shall the righteous be able to live because of his righteousness in the day that he sins.'
When I say to the righteous that he shall surely live, but he trusts in his own righteousness and commits iniquity, none of his righteous works shall be remembered; but because of the iniquity that he has committed, he shall die.”
The above applies to the Christian as much as to the Jew.
Without genuine repentance (turning from and not returning to sin) there can be no forgiveness.