First of all, it is important to realise that no-one is perfect and free from sin, apart from Jesus and Mary. Christians also commit sins, and it is important for each of us not just to be proud of our good deeds.
On the contrary, a good Christian is someone who is aware of his sinfulness and who keeps trying to live in surrender to God. Only when you realise this can you understand what it means that Jesus came to save us from our sins.
