“Your kingdom come, your will be done, on earth as it is in heaven.”
Good and right prayer asks for the Kingdom of God to come, for God’s will to be done, and (perhaps most importantly) that God’s will be done on earth.
This is the linchpin of the Lord’s Prayer. It sets the context for the rest of Jesus’ prayer model. (Side note: We must always view the Lord’s Prayer with fresh eyes and not as something to merely say repeatedly with hollow hearts.)
Here we come to the perennial hope of the Christian faith: the Eternal Kingdom. The concept of a realized place and time where/when humans and the Divine are in perfect communion with one another and all is good and right. The prayer of Christ admits that there is a heavenly realm where this already exists, and at the same time it pleads for that Kingdom to come to earth as well.
So, when we pray that the Kingdom come on earth as it is in heaven, we are also required to live that out in tandem with our aspirational prayer. We cannot go about saying the world does not matter, only eternity matters. No, we must instead go about working for the Kingdom today, striving to see first-fruits of it now, in our midst. Yes, we will not see it in its entirety (that is why we pray for it), but if we are not working towards the Kingdom now, then our prayers are empty, devoid of reverence.
Praying for the Kingdom means then living as though the Kingdom were already fully here. This should influence how we live our day to day:
How we treat one another.
How we care for the land, sky, and seas.
How we go about our daily work.
How we live this life with family and friends.
How we value our rivals.
How we respect animals.
How we think of our nationality.
How we view the world and the universe.
How we innovate and create.
We live a rooted and fruitful faith by always bringing about the Kingdom, through prayer and action.