When Christians gather for worship we sing and pray to a God that we cannot see. We read from a book whose last chapter was written 2,000 years ago. We hold tightly to what we cannot touch. We give money that yields no measurable earthly return. We love whether or not it is reciprocated. We inhale a sweet aroma that our senses cannot detect. We believe in an eternity that we cannot verity by human endeavor.
This is what the Bible calls faith. It is a good thing.