Hi CharismaticLady,
A genuine believer's sins are forgiven - past, present, and future. However, when we sin as believers, there
is a break in our fellowship/intimacy with Jesus that occurs until we repent (1 John 1:9-10), but the relationship is not severed or forsaken by God because our salvation is not based on our performance but on faith in Jesus for what He did for us on the cross. Much like when we argue with our spouse, our relationship
is affected and our fellowship with each other
is interrupted, but we're not divorced just because we've had a spat. When the spat ends and there is repentance, our fellowship and intimacy within the intact marriage relationship are restored. The same is true with Jesus.
On the flip side, however, this truth of our forgiveness is not a license to sin. For those who have been genuinely born again, the Holy Spirit resides within them to help them overcome sin and to not desire sin. It is a process of growth and maturity in our faith. So for those who sin and have no conviction about it or think it's "okay," then I strongly question their salvation. One of the evidences that we have been saved is our disdain for sin or our uncomfortableness in it.
It's funny though when I was first saved 32+ years ago, I really didn't think I sinned anymore. I was so blinded to my own self-righteousness and pride! But as Jesus matured me and grew me up in Him through His Word, I realized how much I actually sinned without even realizing it. The sins that are obvious are easy to detect but the sins of the heart are far more deceptive and hidden. I now understand why the Apostle Paul started out describing himself as the "least of the Apostles," but as he grew and matured, he described himself as "less than the least of all the saints," and at the end of his life, he saw himself for what he really was - the Chief of Sinners! That doesn't mean Paul sinned more as he got older -- it just means that, as he grew in his faith, he realized how much of a sinner he still really was and how much he needed the blood of Jesus even then!
The same is true of all of us when we understand how much we miss the mark of God's "perfect holiness" in word, thought, action, motive, deed, etc. We should be getting more humble as we age in Christ because we're realizing how much we still need his grace and mercy every single day!