I signed up for a Word of the Day mailing last week and I love the words they send out. Today's Word of the Day for Wednesday August 16, 2000:

megalomania \meg-uh-lo-MAY-nee-ah; -nyuh\, noun:
1. A mania for grandiose or extravagant things or actions.
2. A mental disorder characterized by delusions of grandeur.
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Megalomania is Scientific Latin, from the Greek elements
megal-, great + mania, madness.

I find that not enough people express these this particular form of madness. Perhaps we wouldn't have the same issues with low self-esteem if we thought we were our own version of God.