It's a little like showing the love for one's mother. I can demonstrate to other's by buying her flowers, gifts, helping her, hugging her, etc, but without those physical demonstrations you just have trust me when I say that I love her. This blind faith exists everywhere on a day-to-day basis. I can describe the most beautiful sunset, but my lack of a photo isn't proof that it didn't happen.
Another reason why religion just doesn't 'add up'.
To be honest, I think once of the most telling things from the Bible is from Luke when he basically says there's no point looking for the kingdom of God because you won't physically find it. No-one can point it out to you because the kingdom of God is WITHIN you... but that's a discussion for the Religious forum!