I've been researching the subject a little bit and I'm confused. When Christians talk of 'our sins' are they talking about the Sin we're born with or the little sins/transgressions that we commit every day? When one is baptised, christened.etc is it our inherited sin we're washing away alone or is it our Sin and our little sins or is it just our little sins and not our inherited Sin?
There are different perspectives, as can be seen in this thread.
As I'm Lutheran I'll offer the Lutheran position. In Baptism God Himself takes hold of us, unites us to Jesus Christ and what Christ has done--His death and resurrection. Thus through Baptism the Holy Spirit appropriates to us the saving work of Christ and thus
all of our sins are washed away, since Christ died for the sins of the whole world, for all sin.
As such in Baptism we are regenerated, born again, given new identity and new life in Jesus Christ. As such all of the former things which formerly condemned us, our sins--both the concupiscence (the sinful disposition) which we were born with as fallen human creatures as well as all of our personal sins--are washed away, and we have been purified, cleansed, by God's grace and Christ's work. But Baptism doesn't apply only to our former sins, but to all of our sins. Baptism brings that new identity and new life, and so our whole lives, all that we are, is brought through the water--our past, our present, and our future. So in Baptism even our future sins are washed away by the atoning blood of Jesus.
This is not a "get out of jail free" card, but a promise from God to us, that no matter how weak and frail we are, no matter how many times we may mess up, there's simply nothing we can do that can change God's love toward us. Forgiveness is freely given, not earned. Forgiveness is ours before we ask; forgiveness is ours before we even know about it, we are forgiven because God graciously loves the whole world, and through Christ chooses to reconcile the world to Himself in that love and grace. It is by grace, not works, that we are saved.
As such, as Lutherans, we are regularly encouraged to remember our baptism. Through a life of repentance we are mindful of our shortcomings, but never destroyed by them; having God's word and promise that we are forgiven, and so can walk forward in grace. We remember our baptism because it was there that God met us and took hold of us, and so our life has been set free in the liberty of Christ. From our first cry to our last breath on this earth. All that we are, everything we have, is from God who graciously and lovingly has given Himself freely to us in Jesus, through Holy Baptism.
-CryptoLutheran