Again David Timms has nailed it!
We are more concerned with our own victory over sin than the fact that our sin grieves the heart of God. We want to defeat it with sheer determination and glory in our achievement. However, sin is not about breaking the rules but ruining a relationship – our relationship with Him.
Our preoccupation with success hinders our pursuit of holiness. We are discouraged by our failure to defeat sin chiefly because we are success-oriented, not because we know it offends the Father. It might dramatically change our approach if we grasped the biblical truth that God wants us to walk in obedience – not victory . Obedience is oriented towards God; victory is oriented toward self.
The gospel declares that victory over sin belongs to Christ, not us. He has already conquered the power of sin and death (1 Cor 15.55-57). In another place, the Apostle Paul urged us to “consider ourselves dead to sin, and alive to God through Christ Jesus” (Rom 6.11). Victory was established at the Cross. Our response is to “not let sin reign in our mortal bodies” (Rom 6.12). We obediently “present the members of our bodies as instruments of righteousness to God” (Rom 6.13).