An Argument from Wayne and Garth
P1. If a maximally great being is impossible, then it is possible that I am worthy of worship.
P2. It is not possible that I am worthy of worship.
C1. A maximally great being is not impossible [from P1 and P2 Modus Tollens].
C2. A maximally great being is possible [from C1 by Obversion].
P3. If a maximally great being is possible, there is a maximally great being.
C3. There is a maximally great being [C2 and P3 Modus Ponens].
Defense of Premises:
P1. If there are no possible worlds where there is a being that has a maximal set of compossible great-making properties, then there is at least some possible world where I, or my counter-part, is the greatest being that happens to exist, and so I would be of greatest worth, i.e. worthy of worship.
P2. I know, through direct intuitional self-knowledge, that it is metaphysically impossible that I am a being worthy of worship.
P3. A maximally great being is a being that, if it exists in any possible world, exists in all possible worlds, including in the actual world.