For any believer, God must manifest in reality to have any significance at all to mankind. The non believer has to be shown where that encounter can be found and what they ought to be looking for when they get there. God must be empirical in some way, in some manner of experience.
It profoundly baffles me that apologists literally point to the skies, the rocks, the seas, to animals, or to well groomed logical possibilities, thinking somewhere in the world, God can be found; an object, a property, concrete.
Experience is believing. If the believer has none, then what good is the idea of God? If he himself is not a manifestation of God — that esse of volitional, creative, caring spirit — then who should be interested in listening to him? His proof isn’t to be found where he points, in any direction and at anything in particular, and is not an icon himself as proof of the value of some experience promised; the believer is not transformed in any way, and that can be the only proof that ought to matter at all, and the only kind of proof possible.
Talk is cheap, and god-talk, generally useless.