Miroslav Volf

For Christian faith not to be idle in the world, the work of doctors and garbage collectors, business executives and artists, stay-at-home moms or dads and scientists needs to be inserted into God's story with the world. That story needs to provide the most basic rules by which the game in all these spheres is played.

The historical novelist has to consider what has actually happened, while the SF writer is dealing in possibilities, but they are both in the business of imagining a world unlike our own and yet connected to it.