The Purifying Blood of Christ
[W]e are not washed by Christ, that we may plunge ourselves again into new filth, but that our purity may serve to glorify God. Besides, he teaches us, that nothing can proceed from us that can be pleasing to God until we are purified by the blood of Christ; for as we are all enemies to God before our reconciliation, so he regards as abominable all our works; hence the beginning of acceptable service is reconciliation.
– John Calvin