Irving R. Kaufman

To the extent that the judicial profession becomes the daily routine of deciding cases on the most secure precedents and the narrowest grounds available, the judicial mind atrophies and its perspective shrinks.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.

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.