AnAtheist:
A perfect/omnipotent/eternal being is logically impossible. God cannot be eternal and omnipotent e.g. Being eternal forbids being able to terminate one’s own existence, thus not omnipotent.
“Eternity” does not mean a never-ending trip through time; eternity is the state of existing
outside time. Those who reside in eternity are not subject to time; God, as the Creator of time, has complete control over it. I’m afraid that the idea of God being able to end His own existence is a non sequitur, as “ending” implies “beginning”, and neither of those concepts are pertinent when dealing with eternity.
AnAtheist:
Or the classic: Can God create a stone, he is not able to lift?
A classic, to be sure - a classic logical fallacy. You proceed from conflicting premises: if there is an Irresistable Force, there can be no Immovable Object; if there is an Immovable Object, there can be no Irresistable Force. You try to use logic to prove that God does not exist, and wind up hoist by your own petard.
Personally, I doubt the existence of immovable objects; wasn’t it Archimedes who boasted that with a fulcrum and a long enough lever, he could move the world?
Douglas Adams said it best (and I’m paraphrasing
The Hitchhiker’s Guide to the Galaxy): Man uses logic to prove God does not exist; he uses this same logic to prove that black is white, and Man goes and gets himself killed at a pedestrian crossing.
Your unbelief in God is irrelevant to the fact of His existence. If that sounds peremptory to you, now you know how Christians feel when atheists smugly denounce their intelligence.