The truth is Jesus Christ forgave ALL our sins. In fact, Jesus paid for the sins of not just the believers but for the whole world.
“And he is the propitiation for our sins: and NOT FOR OURS ONLY, but also for the sins OF THE WHOLE WORLD.” (1 John 2:2 KJV)
Remember that all our sins are future to Christ on the cross when He paid the penalty for the sins of the whole world. And so, even the sins we have not yet committed but will commit in our future were also PAID IN FULL on the cross. When Jesus said, IT IS FINISHED, the Greek meaning is PAID IN FULL. Jesus did not provide a partial penalty payment!
We know that after Salvation we should try our best not to sin. Grace is not a license to sin. We hear that all the time. But that does not mean after Salvation that a believer wants to and loves to sin. NO! If a person feels that way.. they need to question their belief and Salvation through Christ.
A believer will hate it when they do sin! Yes believers sin! The Holy Spirit will discipline a believer when they do. What I mean is, when a believer sins we feel horrible and guilty about it. We go to God and confess to God that we blew it…again, and to help us not repeat the sin. However, we should be confident that all our sins will never again keep us from heaven. It can affect our fellowship with God. But our Salvation is eternal and never to be lost.
Here is an analogy. A father says to his child, do not play in the street. It is a rule. DO NOT play in the street! Why does a father or mother restrict like that? Because he/her loves his children and does not want them to get hurt by oncoming cars right?
Now one day, the child played in the street and a car hit the child. The child received a broken arm. What does the father do now? Run out and tell the child they are kicked out of the family and banished from home?? Of course not!
Question… is this person still a child of the parents? Well, yes of course! The Father is grieved because the child disobeyed and is not hurt by their wrongful action even though they were told a command not to play in the street. So as a grieved father what does he do? He holds the child, tells them I told you! But then the father hugs the child and supports the child until they are better because the father loves his child. The Father is always wanting to help his children.
THIS is what is meant when the Bible says,
“And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.:” (Ephesians 4:30 KJV)
You notice that in this verse it mentions not to grieve the Holy Spirit but it ALSO mentions we are SEALED unto the day of redemption. We do not lose Salvation based on our sins. It grieves God? YES. Does God kick you out of the family of God because of sin? NO.
The penalty for sins was ALREADY PAID IN FULL on the cross.