Above: One of the many Christian songs for Kids

If a being can perform any action, then it should be able to create a task which this being is unable to perform; hence, this being cannot perform all actions. Yet, on the other hand, if this being cannot create a task that it is unable to perform, then there exists something it cannot do.

God exists. God is omnipotent, omniscient, and omnibenevolent. An omnibenevolent being would want to prevent all evils. An omniscient being knows every way in which evils can come into existence. An omnipotent being has the power to prevent that evil from coming into existence. A being who knows every way in which an evil can come into existence, who is able to prevent that evil from coming into existence, and who wants to do so, would prevent the existence of that evil. If there exists an omnipotent, omniscient, and omnibenevolent God, then no evil exists. Evil exists (logical contradiction).