Romans 8:35:
Who shall separate us from the love of Christ? Shall tribulation, or distress, or persecution, or famine, or nakedness, or peril, or sword (KJV)
This passage suggests that nothing will separate us from the Love of Christ, this is something that is assured, this is something that even sin cannot prevent us from receiving, Christ's Love and forgiveness. Nothing can separate us from it, not even our Sin, He loves us regardless of our sin. If we read the passage closely however, we see a few things that stand out. One, the attributes listed in this passage are not sinful actions but things outside of our control, things that may and certainly do happen to Christians in the course of their lives those are persecutions and hardships fallowing in Christ’s footsteps Also, the passage before...
Romans 8:34:
It is Christ that died, yea rather, that is risen again, who is even at the right hand of God, who also maketh intercession for us
Paul is speaking to believers, and suggests that Christs death on the cross did not complete our salvation, rather Christ, who continually intercedes for us as a slaughtered lamb, does so even after conversion, his love for us even in our sin will not falter, he will not divorce us and put us away from his Grace, he wants to know us, he wants us to repent continually and offer himself before the father for that salvation we are promised by our obedience of faith.
So now when we do read 1 Corinthians 6:9-10 we see that it is not Christ whose love is separated from us, but our love that is separated us from Christ and the father by Sin.
1 Cor 6:9-11:
Know ye not that the unrighteous shall not inherit the kingdom of God? Be not deceived: neither fornicators, nor idolaters, nor adulterers, nor effeminate, nor abusers of themselves with mankind, Nor thieves, nor covetous, nor drunkards, nor revilers, nor extortionist, shall inherit the kingdom of God. And such were some of you: but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God
Now we have a list that does separate us from the Kingdom of God (Salvation) this list is not one of persecutions and hardships listed as things that do not separate us from the love of Christ, but things that WE DO that separates us from the Christ sacrifice. It is these actions that we choose with our free will that separate us from the free gift, the Grace.
The Nature of eternal security is that we are Completely saved, Sanctified, Justified 100% by Christ’s sacrifice on the Cross. There is nothing that we could have done to merit such a Grace; it is all God through his Son. Having been so sanctified and Justified, An action completed by uniting ourselves to Christ by Repentance through Baptism (of some sort) and Faith (if we are old enough to manifest it). We are now “IN CHRIST JESUS” responsible to stay in that Grace, to abide in Christ, to be his Covenant People, which means to be obedient to his ordinances and walk in his statutes. At the one and only Judgment, Christ, sitting on the right hand of God, will look down at us and say as in Mathew 7:21-23:
Not every one that saith unto me, Lord, Lord, shall enter into the kingdom of heaven; but he that doeth the will of my Father which is in heaven. Many will say to me in that day, Lord, Lord, have we not prophesied in thy name? And in thy name have cast out devils? And in thy name done many wonderful works? And then will I profess unto them, I never knew you: depart from me, ye that work iniquity
The words that the apostle Paul uses when speaking of eternal security are "Hope" and "May" with provisions usually concerning our "Abiding" in Christ, not being separating ourselves from the Root. If God's Chosen people can be separated from the Root, be Assured, so once attached to the loving mercy of our lord Jesus Christ, our actions listed plainly in the commandments can and will, without the sacrament of Reconciliation or other Graces known only to God the Father, will indeed separate us from the "Joy of His Salvation". (Psalm 51:12)