when we ask the the Father's Kingdom to come on earth, we are asking God's indwelling Presence in our lives...which became possible thru the death and resurrection of Christ and then before Christ went to sit at the right hand of the Father, He left the Holy Spirit to dwell in those who are born again to His Kingdom.
The will of the Father is perfect, pleasing and it is not to harm us, but it is to prosper us and whoever does the will of the Father pleases HIm. Our Lord Jesus had set us a good example. ANd these should be our cry to let His Will be done on earth. When we pray like this, we also do the best we could with the grace of God to live a life that is in line withHis WOrd. and the meditation of our heart is pure.