Sinning (especially the sin of pride--increasingly popular with those who call themselves Christians) is just evidence of guilt.
We are ALL sinners, we all know sin is wrong. There are those who chose to sin without any consideration to what is will ultimately cost them, the just live in the now.
Then there are we Christians who also know sin is wrong. But we choose to not give into our sinful nature and we know that we can only do that with the help of God. We accept Jesus’s wonderful gift of salvation and we understand that the cost of not accepting Jesus as Lord and savior will cost us everything, so we choose to live for what comes after we die, rebirth and an eternal life that will be perfect in every way.