The Epicurian Paradox. God claims to be omnipresent, omnipotent, and omnibenevolent. But the mere existence of evil overwhelmingly disproves this claim:

1. If god is able and willing to stop evil, but evil is able to hide from/fool god, god cannot be omnipresent.
2. If god is able to find all evil and willing to stop it, but unable to do so, god cannot be omnipotent.
3. If god is able to find evil and stop it, but unwilling to do so, god cannot be omnibenevolent.

In any of the three cases, if evil exists, god has been proven a liar in at least one of the three claims. Potentially two, or even all three. But at least one must be true if evil exists. And if at least one is true and god is a liar, why are we following him?