To have faith in what you cannot see and do not know is hard. My experience of it, is that it takes a deep sense of self in order to maintain a strong sense of faith.
I have found that in order for me to take the leap into the dark, when I am at the edge of my light, I have to be ok with the possibility that even if there is no solid ground, even if I don't learn how to fly....I will be ok. If I fall flat on my face...I will be ok.
Only then can I take that step. Only then can I move.
I truly believe in the Universe and that the energy around me- my guides- are always holding me. However, faith for me, in a lot of ways is the belief that I can hold myself.