A faith that is created is often used for mental sense of security and hope in something better, or is something to help a person feel empowered through their works, beliefs and their attitude toward the world.
However, faith was never meant to stand on just an idea, what is needed is something applicable to a real life. So what is more powerful to a person than something actually happening in real life when it agrees with their faith? Nothing, many people die for faith that truely affects their reality.
To say that you have seen people who were blind suddenly receive sight is almost laughed at as evidence to others, and highly discredited when on video/audio. But when it has happened to you, then you know that the power at work is the thing responsible, not just a presupposed idea.
So, what then actually affects real life? Well, if we look at religions across the world, almost every founder or instigator was inspired by knowledge they found or took from a strange being, book or writings/drawings. maybe even idols. Some have had direct experience with deities and have documented and eye witness account of what happened to them or what they were able to do. Witchcraft has power for example, but when compared to say the torah from jewish writings, they declare the power to be demonic or under the influence of a god, (demon)
Okay, so we have established that basically the greatest power wins right? the one who is able to do anything and everything they want without regard to other deities or rules has got to be the freest (in regards to other deities) and most likely the most powerful. So what God is the most powerful and most free of all? I would argue YHWH is. There hasn't been a god yet that has defeated him or subjected him or made his words not come to pass other than himself.
Try him, seek his word and read it. ask him questions while reading, ask for healing, ask for peace (According to his word) and see if he does it, and if he doesn't, why doesn't he? If we have one life, why live in doubt? why not try to find peace? healing? meaning?
Untested faith is no better than a lie.