"Thy will be done on earth as it is in heaven." "we pray that God, by his grace, would make us able and willing to know, obey, and submit to his will in all things, as the angels do in heaven." Thus says WSC Q103.
To me, this is a continuation of the second petition: to pray that God's kingdom will come. We bring about God's kingdom by knowing, obeying, and submitting to his will.
We certainly don't do it perfectly and cannot do it without the Holy Spirit's guidance, which is why we must pray every day for God to help us to obey him, to love our Lord by obeying him.
This is such an encouragement when you are seeking to be healed from sin and codependency. While you want to help fix things, you know that you can't and have to rest on what Christ has done and what he will continue to do as he guides you with his Spirit.