@igm,
Yes indeed if you meditate and do so with determination to attain enlightenment you will arrive at proof of God. And yes I have had such experience as a result of meditation, although the most profound mystical experience that I had was spontaneous, albeit after years of daily meditation.
I want to elaborate on two points here. I have said "you will arrive at proof of God" but this "you" is not the personal self (ego self). If you persist in meditation you will begin to realize thoughts/ideas give rise to somatic changes, ie the emotions and other states as well. Emotions are not some stuff on a virtual hard drive/your brain but changes to whole body function. These changes means the body is moved away from rest. Allowing the thoughts to rise and fall without becoming hooked by them allows the body to remain at rest. This takes arduous practice. When this happens the self vanishes. You begin to realize that the personal self is ephemeral, it comes into being with the many and varied thoughts and the associated modification to body function. It is difficult at this point to discuss because our language and the way we talk is through the personal self. So who begins to realize? What happens is that with extinction (of the personal self) there is not complete extinction, that is there is not nothing at that point. Rather the identity shifts and there are stages. One of the earlier stages is that the meditator identifies self with everything around them. They identify with other people but not on a personal level. It is hard to explain this. You have to get there yourself to understand. At a later stage the identification is one of the Impersonal or Universal Self knows /experiences Itself. The "only I alone and sacred". Again it is very hard to explain. Enlightenment is about grasping an understanding of reality, true nature, the truth of "I am That I am".
The other point I want to make is that there is a huge difference between spiritual experience and mystical experience. In spiritual experience the personal self or at least some remnant of it is still there. I had a number of spiritual experiences before I had the first mystical or enlightenment experience and it was a fleeting one at that time. Looking back now I can see that the spiritual experiences were experiences of encouragement. Some I had in childhood but the more significant ones come just before and during the time that I studied with my guru in Sydney. In all spiritual experiences you still have the sense of yourself as an observer. In the mystical experience the observer is gone.
I am not by any means unique or special in having had enlightenment / mystical experiences. It is the birth right of everyone. The inhumane or evil people have throw this away for the sake of the personal self, which dies in the death of the body. They are fools. They live for some kicks but they will never know supreme bliss. Those who are humane, regardless of their sins (missing the mark or getting it wrong sometimes) are all capable of finding this state of supreme bliss and cheat death. It is this reason that I believe we need a new reformation. Reading the holy texts is not good enough, it is only hearsay and many holy books have been corrupted for socio-political and economic reasons. It is of vital importance that everyone find the way themselves and know the truth themselves through first hand experience.