God for example

I belief that not everything in this world needs to be proven, God for example. Not everybody believes in God even if people saw him some will still deny. We do not need to prove it, and why should we care if someone doesn't believe it. Believing in God is a personal faith and everyone is free to believe in what he/she wants to. Besides I think it is a waste of time to try to find proofs for Gods existence while we can have that time searching for a better job or a better house. Doubts in Gods existence are not helpful. We need to concentrate on material things, medicine for example. Is that medicine is better than another one at treating cancer? Isnt that more necessary to prove? Life is full of surprises and so fast that I find it hard to accept the fact that anyone would agreeably choose to go through their career as an "bright" creature on this earth with the idea that they actually know anything with absolute certainty. In my opinion, there will be no certainty at all. It is hard to change peoples beliefs by knowledge because these beliefs have been living inside their minds and soul for a while. We can not just take them away in such a short time. These beliefs lived there as a part of the human body. Skepticism is necessary in life but in limits. If we doubt everything, we will never belief in anything. I have a close friend that we have been together for along time sharing good times and bad times and if someone comes up to me and tell me that my friend is cheating or talking on my back, I should not be concerned no matter what because if I was concerned then I do not have trust on my friend, and therefore I am not a friend. However I will go and ask my friend about it. Being concerned about it with emotions is not in the limit, but asking my friend is needed. We can not say that we have enough knowledge no matter how long we have been learning or searching. Knowledge is an infinite subject...