One of the goals of Apologetics is to deal with the objections that people have regarding the existence of God. For the last several weeks, we have been listing some of these objections and the arguments that address them. Here is where we address the possibility of the nonexistence of God:
Possible Nonexistence: According to this objection, it is always possible to conceive of anything, including God, as not existing. Hence, nothing exists necessarily. Since God is said to be a Necessary Being, then even he must not exist necessarily; therefore God must not exist at all.
This is a valid objection to the ontological argument, but not against the cosmological and teleological arguments. It is possible that nothing would ever have existed, including God. So a total state of nothingness is not an impossible state of affairs. However, something does undeniably exist, and so this objection is irrelevant. For as long as something finite does exist there must be a Cause for its existence.
Geisler, N. L. (1999). In Baker encyclopedia of Christian apologetics (p. 292). Grand Rapids, MI: Baker Books.