A few excerpts from Thomas Watson’s The Lord’s Prayer:
The manner in which we do God’s will is as important as the thing itself. We obey acceptably when we obey from the heart. …
Many do God’s will by halves. They pick and choose like a lame horse that favours one leg. To play a lute you must strike every string or spoil the music…The command, not comfort, is the ground of duty. Secondly, we obey sincerely when we do God’s will with a pure eye to his glory. The Pharisees obeyed for vain-glory. He that does God’s will rightly desires God’s honour to be lifted up in all the world rather than his own glory. A gracious soul makes God his focus and obeys his commands with the pure motive of lifting up his glory.