intense, I am not sure it is a matter of simply answering yes or no based on the conditions ascribed. Do I believe in a higher power? Most certainly. Do I believe he is omniscient or such? That is impossible to say.
I am a scientist by nature, and one thing I learned from readings in the higher echelon of science journals and going to lectures across the country, particularly related to the Big Bang Theory and other ones thrown out there is that science can't explain the very beginning.
I have absolutely no comprehension of the beginning of the universe, if there is one. Every day I realize that there is so much complexity to the universe that the best I could ever hope to achieve is to get some semblance of a bigger picture. The funny aspect about science is that so much is based on faith.
If I am interpreting you correctly, and based on your vast self-questioning of the subject, I would agree that one might never know. It is a loaded question to say the least, but I agree with Ice that sometimes, it helps to acknowledge that there are times we feel better with the belief. I know after I leave mass that I at least feel someone supporting me in a way I cannot possibly comprehend. Multiple psychological theories might be ascribed to that, but there is so much we do not understand about ourselves let alone aspects outside our own planet. For now, I have to believe in something greater than myself (that and the pre-seminarian studies I did).