Give me understanding, and I will keep your law
and obey it with all my heart.
Direct me in the path of your commands,
for there I find delight.
In Psalm 119 we are told to pray for understanding of the law. Later in the psalm we are also told to ask for guidance to keep the law.
We can’t keep the law to perfection. This is why it was necessary for Jesus to die on the cross for our sins. But just because we can’t achieve perfection it doesn’t mean that we should give up on trying to live a holy life.
There are benefits to following the law apart from the fact that God gave us the commands. The rules that God handed to us are meant for our own good. There are consequences to sin beyond getting caught and punished. God gave us laws because He loves us and wants to protect us.
For this reason, we ought to pray for help to keep God’s laws. God gave us the Holy Spirit and we should call upon Him as much as possible for help. The Holy Spirit gives us understanding of the law. He points us in the right direction when we don’t know which way is proper. And the Spirit also gives us the strength to fight the temptation to sin.
We have the world, the flesh, and the devil all working against us, trying to cause us to sin. Fortunately we have the Holy Spirit on our side to help us keep the law.