where in the Book did you get this?
i would think that if you were once a believer and then denounced Christ then that would cancel your salvation, the bottom line being that you dont believe not that you once believed.
Denouncing Christ seems pretty strong but the way I see it, even if the person denounces Christ, if they ever truly believed, they are still saved.
John 10:28-29 I give them eternal life, and they will never perish; no one will snatch them from my hand. My Father, who has given them to me, is greater than all, and no one can snatch them from my Father’s hand.
John 5:24 I tell you the solemn truth, the one who hears my message and believes the one who sent me has eternal life and will not be condemned, but has crossed over from death to life.
Romans 8:38 For I am convinced that neither death, nor life, nor angels, nor heavenly rulers, nor things that are present, nor things to come, nor powers, nor height, nor depth, nor anything else in creation will be able to separate us from the love of God in Christ Jesus our Lord.
Titus 3:5-7 he saved us not by works of righteousness that we have done but on the basis of his mercy, through the washing of the new birth and the renewing of the Holy Spirit, whom he poured out on us in full measure through Jesus Christ our Savior. And so, since we have been justified by his grace, we become heirs with the confident expectation of eternal life.”
Ephesians 4:30 And do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.
2 Corinthians 1:22 who also sealed us and gave us the Spirit in our hearts as a down payment.