When God says, " I will never leave nor forsake you," doesn't that give you a hint that your actions after salvation are no longer detirmined whether God turns from YOU!
After salvation it not about what you do, it's about what God PROMISED you he would do. And that is NEVER leave you. If anyone thinks that God's promise is not sufficient to save to your life, eternally, then Christ sacrifice was in vein.
John10:28 I give them eternal life, and they shall never perish; no one can snatch them out of my hand.
That's a promise that is never ending no matter what!
"If we deny him, he will also deny us." (2 Timothy 2:12) "But he that shall deny me before men, I will also deny him before my Father who is in heaven." (St. Matthew 10:33) "Know you not that the unjust shall not possess the kingdom of God? Do not err: neither fornicators, nor idolaters, nor adulterers, Nor the effeminate, nor liers with mankind, nor thieves, nor covetous, nor drunkards, nor railers, nor extortioners, shall possess the kingdom of God." (1 Corinthians 6:9-10)
John10:28 I give them eternal life, and they shall never perish; no one can snatch them out of my hand.
This speaks only of the elect.