Listen to the way Lewis describes this insight from his book on the Psalms. I thought of it in terms of complement, approval, or the giving of honor. My whole, more general difficulty about the praise of God depended on my absurdly denying to us, as regards the supremely Valuable, what we delight to do, what indeed we can't help doing, about everything else we value. It is not out of complement that lovers keep on telling one another how beautiful they are, the delight is incomplete till it is expressed. If we were not allowed to speak of what we value and celebrate what we love and praise what we admire, our joy would not be full.
Praise is the most joyful work in the world.
Therefore, if God is truly for us, if he would give us the best and make our joy full, he must make it his aim to win our praise for himself. God is the one Being in all the universe for whom self-centeredness or the pursuit of his own glory, is the ultimately loving act. For him, self-exaltation is the highest virtue. God is for us, and therefore has been, is now and always will be, first for himself. I urge you not to resent the centrality of God in his own affections, but to experience it as the fountain of your everlasting joy.