Belief is completely a matter of Faith. There is no hard evidence as can be found in any of the sciences, cannot be. Afterall, GOD is something which cannot be tested, observed, replicated or subjected to peer review.
This is true. The question is where does the faith come from and what does it entail. You appear to argue below that is comes from you.
It really is that one day, someone does say that they believe in GOD. They may have various reasons; in my case I look at the Universe, the fact that the rules seem to be consistent across everything we've observed, the absolute wonder of Evolution and the system that lead to the magnificant variety and malleability of the life we see, lead me to my belief in GOD, but it is simply a matter of Faith, not something I can prove.
If your belief does indeed arrive from within, then it seems to be a matter of deduction. There is no mention of any revelation from God in aiding you to come to this conclusion. Presumably you do not know he exists
Others, me included, would say that faith and belief are things that God gives us. He is the one who enables a person to believe in him. He does this by revealing himself to the person.
belief from within vs belief from without. Different things. Faith in the latter can be seen as a highway along which God transports knowledge about himself to the believer