Romans 8:3 For God has done what the law, weakened by the flesh, could not do. By sending his own Son in the likeness of sinful flesh and for sin, he condemned sin in the flesh
We misunderstand the Law handed down by God if we think it’s our job to keep it fully in order to be on the Lord’s good side. I’m not talking about earning salvation, most Christians would agree that we are saved by grace through faith alone and that our good works don’t get us there. But what happens after that? Something seems to change inside of us that makes us think we can now earn God’s favor by obedience to His Law even after we’ve been saved.
Just as we couldn’t keep the whole Law before we were in Christ, we still can’t keep the whole Law after we’ve been saved. We’ve been freed from sin and empowered to obey, but we’ll still never make it to the perfection the Law requires. We’re still human.
So, if we can’t keep the Law, what purpose does it serve Christians? If it doesn’t earn us salvation and it doesn’t perfect us in sanctification, what is it good for?
The Law does serve a purpose in showing us our sin. It shows us our need for Jesus. This is true on both sides of salvation as it shows us our need for a Savior before when we are lost and then shows us our continual need for the power of the Holy Spirit working in us as we walk in our faith. God knew we would never live up to the Law. It’s why He sent His Son to fulfill the Law that we might be freed from it’s bondage. Now it serves as a reminder that we need Him every single day.