Is Seeing Believing?

Belief, a concept that varies from every individual's opinion. The world is covered with lots of different beliefs, from religion to personal beliefs. However what we believe in mostly relies on what we see or what we don't see. Religions such as, Christianity, Judaism and Islam believe in the 'God' we never see. Why is that? For example, if I will tell a random person that I have 10 million dollars in my bank account, as much as it is not realistic it does not differ from the concept of religion and believing in someone that creates miracles. Us, human mostly don't believe in things that are not in the range of our imagination, however we never stopped believing in god. Of course that there are people who do not believe in god however, many industries are relied and based on that amazing thing we have never seen. So in order to believe in something, we have to sort of jump from the conscious we have to a complete belief otherwise we would have stayed hanged up in the air, which in reality happens to most of us. On the other hand, optical illusions can make us believe in something that does not exit at all, which brings me to a conclusion the seeing and believing do not rely on each other. Therefore, in order to really believe in something all that is required is just to make up a decision on whether we believe in that thing or not even if we don't see, but if most people are like me it is really difficult to take that decision to decide.