This article is from the Atheism FAQ, by mathew firstname.lastname@example.org with numerous contributions by others.
If God interacts with our universe in any way, the effects of his
interaction must be measurable. Hence his interaction with our
universe must be detectable.
If God is essentially non-detectable, it must therefore be the case
that he does not interact with our universe in any way. Many atheists
would argue that if God does not interact with our universe at all, it
is of no importance whether he exists or not.
If the Bible is to be believed, God was easily detectable by the
Israelites. Surely he should still be detectable today? Why has the
Note that I am not demanding that God interact in a scientifically
verifiable, physical way. I might potentially receive some revelation,
some direct experience of God. An experience like that would be
incommunicable, and not subject to scientific verification -- but it
would nevertheless be as compelling as any evidence can be.
But whether by direct revelation or by observation, it must surely be
possible to perceive some effect caused by God's presence; otherwise,
how can I distinguish him from all the other things that don't exist?