Q. I was having a discussion with someone and they seem to think that from the moment you are born again, God does not forgive you for future sins only your past sins before you were born again. Is there a scripture that says or implies specifically that Jesus died for our future sins after being born again?
A. There are several.
In Colossians 2:13 Paul wrote, “He forgave us all our sins”. The Greek word he used means each and every sin. That means past present and future.
In Ephesians 1:13-14 he said our salvation was guaranteed from from the moment we first believed. How could he have said that unless our future sins had been forgiven as well as our past ones? He said essentially the same thing in 2 Cor. 1:21-22 and 2 Cor. 5:5.
In Hebrews 10:14 the writer said, “Because by one sacrifice He has made perfect forever those who are being made holy.” How could God see us as perfect unless all our sins had been forgiven?
I could go on, but I think you get the idea.
Had this not been the case, everyone who has been saved would have been lost again within a few days, and the Lord’s death would have amounted to nothing. The reason is that by God’s standards it’s humanly impossible to stop sinning.