Al Mohler has an outstanding post on whether or not God is self-centered and megalomaniacal.
Is the God of the Bible the supreme egotist? That question arises when human beings contemplate the meaning of the truth that God does everything for the sake of his own glory. Is God then a megalomaniac?Read the entire post HERE.
Human beings are trapped in a human frame of reference. When we think of motivation, we inevitably start with our own self-conscious knowledge of our own motivations. For a human to seek his or her own glory is narcissism in purest form. Human egotism is constantly on display. And, if we are honest, we know that we seek our own glory as a reflex.
In reality, this is the essence of sin. Our desire for glory is inherently idolatrous and selfish. Paul describes this perfectly in Romans 1:22-23: "Claiming to be wise, they became fools, and exchanged the glory of the immortal God for images resembling mortal man and birds and animals and creeping things." This exchange that robs God of his glory is the very heart of sin. We want the glory that is God's alone.