Most of you who know me any, may not know that I went through a period of Atheism in my life. I won't discuss that because it really isn't particularly edifying in itself, but to state that I have some basis lying in both periods of belief and of belief-in-unbelief for the things I say. It's personal, but others might find their situation analogous, or not.
I as a committed and devout Orthodox Christian am generally moved to fury at attempts to ''prove'' the existence of God, which already is in itself a kind of doubt in His Existence, as if He were a being rather than Being, Cosmic, (and thus an object of study via natural sciences and not theological science,) instead of the Maker of the Cosmos and therefore immanent and transcendent in relation to the Cosmos.
Sure, I believe that believing in God is rational, given that He is Reason, the Logos Himself. But because of the obvious anthropological state mankind is in at present, we cannot fully see or appreciate that unless we have our eyes fully opened to that. Therefore, the experience and knowledge of God, to know He exists, is like everything else in my understanding of life; personal and experiential.
So therefore I cannot judge other people simply and merely by the stage they are at in their personal experience of God, or lack of that true personal experience.
I believe however that once one has that experience, and can judge that experience rationally afterwards, life and it's reasonableness is greatly explained.
Because I see God as Three Persons in One God working within and externally to me, see it as a personal relationship (the highest, in fact), looking upon the ''God'' of the natural thinkers, a watchmaker who winds the watch up, the designer who is finished and now quite remote and impersonal, is no kind of ''God'' at all to me. So you'll get no ''proofs'' as such from me, only personal experiences. Not without my brain, but with it. With the eyes of the heart.