I hate to burst your bubble, but that's a big part of our faith and faith in general.
No, we don't see God or Jesus face-to-face, but we know them through the Bible, through the sacraments, through the Church. We see them in others, in their actions, in nature, in light. We feel like God is responsible for everything and that we are His images. Now, is that going to hold up in a scientific study? Probably not. That's where faith comes in. We have faith that it is Him and Him alone who created the world and everything in it.
Now, full disclosure here. I consider myself a fairly firm Christian (well, I would say that if you asked me on the street), but I have my moments, too. I have moments when I doubt that God even exists. I would venture a guess to say that many people on this board have those moments. But for me, the moments do not last very long (for the time being!), because I pray, walk outside, go to Church, look at art, and I'm comforted. I can't PROVE to you that it's Him, but I know that it's Him. Even when I have months where I feel like He's abandoned me, I'm angry at HIM. I am angry at God. I am angry, but I still believe in His existence.
That's why I don't spend a lot of time debating atheists, who want concrete proof that God exists. It's almost written into the code that many of us will never see the "concrete proof" with our eyes.
(Taken from Wiki, sorry guys!)
Where is my faith? Even deep down ... there is nothing but emptiness and darkness ... If there be God—please forgive me. When I try to raise my thoughts to Heaven, there is such convicting emptiness that those very thoughts return like sharp knives and hurt my very soul ... How painful is this unknown pain—I have no Faith. Repulsed, empty, no faith, no love, no zeal, ... What do I labor for? If there be no God, there can be no soul. If there be no soul then, Jesus, You also are not true.
- Mother Teresa
As one of my RC priests said in a sermon, after her initial visions, she never saw one again and she struggled. Yet, she kept going because there was something inexplicable in her that still knew that God existed, even if SHE didn't believe in it at the time (does that make any sense? It does to me!).
We are called to more forward in the same way. Even when I question, in the bottom of my heart I still know.
The story of Jesus and His death on the cross? I KNOW. That is not good enough for someone who doesn't believe in God, but it is more than good enough for me. And my faith isn't even mustard seed-size yet. I have a long way to go and I hope to strengthen my faith.