In reading, you sense the divine: the things that are larger and greater and more mysterious than yourself.
There are many sources of spirituality; religion may be the most common, but it is by no means the only. Anything that generates a sense of awe may be a source of spirituality. Science does this in spades.
I like nothing more than walking down a country lane or along a mountain path - it's not proof that there is anything bigger than ourselves, but I feel very much at peace.
After you have exhausted what there is in business, politics, conviviality, and so on - have found that none of these finally satisfy, or permanently wear - what remains? Nature remains.
A story is the relationship that you develop between who you are, or who you potentially are, and the infinite world.