I think that is part of who we are. We have the choice to believe something or not to believe it.
I don't think the answers are found in any one single organized religion, but you can find some good answers and experiences of others there. I do believe there are few churches abroad who are sincerly trying to do the best they know, but far and few in between. So I dont put too much trust in just religions.
As for a 'power', I see where we are still limited wether we believe something or not. That is part of being a mortal.
But faith is something different to me. It was very difficult for me to STEP OUT on faith in God and build a trust with Him. I think the most difficult thing is trying to SEE something that you can't see with earthly eyes.
Its like closing your eyes and walking across a high dive. That can be scary. But you know there is something there if you fall, and hopefully the water wont hurt too much.
So yes, it is very hard to recognise that something is there that we can't see physically. That is something that takes time to learn how to do.
Love is invisible, but we know it is there and has a lot of power and can be seen through actions, but most of the time Love itself you cannot see.
Thoughts are invisible, but they also have a power.
Another thing to consider is doubt. Something can be real, but when you doubt it, you dont give it a chance.
So the hardest part is probably accepting something that we cannot see. Then the other thing is being sure what you are trying to accept has a good background. If it is real, like I believe God is real, it will manifest itself to you, but not until after we give it a chance.
It is an individual walk, no matter what you try or choose. Believe or not believing.
As for good and evil, well, people have to be kind of blind IMO to not see there is good and evil.
I am still learning about these things too. Those are just some of my thoughts about it.