If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
- 1 John 1:9
There is a term "Once in A Lifetime" that's associated with special circumstances, achievements, or people. It's generally accepted that such events are considered out of our control regardless of our efforts.
In spiritual terms, salvation can be considered a once-in-a-lifetime occurrence as well but I believe is misunderstood when it comes to proper understanding and application of it to our lives.
Before we proceed we must understand a few crucial aspects in relationship to this plan.
1.) Sin - for all have sinned, and come short of the glory of God -Romans 3:23
2.) Salvation offered to all - And all flesh shall see the salvation of God.
- Luke 3:6
3.) Gift - For the wages of sin is death; but the gift of God is eternal life through Jesus Christ our Lord - Romans 6:23
The part that's up for debate and I believe is false is the popular view that you need to continue to confess your sins as a means to sustain your salvation as a continued work.
For by grace are ye saved through faith; and that not of yourselves: it is the gift of God: not of works, lest any man should boast - Ephesians 2:8-9
This also applies to the notion that you can lose your salvation and need to continually recommit by saying the sinner's prayer.
In Him you also trusted, after you heard the word of truth, the gospel of your salvation; in whom also, having believed, you were sealed with the Holy Spirit of promise, who is the guarantee of our inheritance until the redemption of the purchased possession, to the praise of His glory.
- Ephesians 1:13-14
Yes we should grieve and repent when we do wrong whenever possible but we also should not believe the lie of the
the enemy who seeks to make us feel unworthy and act in self-condemnation.
There is therefore now no condemnation to those who are in Christ Jesus, who do not walk according to the flesh, but according to the Spirit - Romans 8:1
Our response should seek to please and honor our savior through our conduct and pursuit of holiness.
But as He who called you is holy, you also be holy in all your conduct,
- 1 Peter 1:15
The question we must ask ourselves is have we placed our faith in his promises for salvation?