God's chief end, purposed in all that he does, is his glory, and he has so made us that we find our own deepest fulfillment and highest joy in hallowing his name by praise, submission, and service.
Christians get so hung up with the pagan idea (very dishonoring to God,incidentally) that God's will is always unpleasant, so that one is rather a martyr to be doing it, that they hardly at first notice how their experience verifies the truth that in Christian living duty and delight go together. But they do! And this will be even clearer in the life to come. To give oneself to hallowing God's name as one's life-task means that living, though never a joyride, will become increasingly a joy road.

JI Packer in Praying the Lord's Prayer

(I've copied this and the quotes in the previous post from the girltalk blog)