Nobody has ever seen an electron. Nor a thought. You can't see a thought, you can't measure, weigh, nor taste it- but thoughts are the most real things in the Galaxy.
Robert A. HeinleinFrom the strictest humanitarian viewpoint, any attempt to stop the processes by which over crowded cities purge themselves is not a kindness.
Robert A. HeinleinWe each have a moral obligation to conserve and preserve beauty in this world; there is none to waste.
Robert A. HeinleinWhat are the facts? Again and again and again โ what are the facts? Shun wishful thinking, ignore divine revelation, forget what โthe stars foretell,โ avoid opinion, care not what the neighbors think, never mind the unguessable โverdict of historyโ โ what are the facts, and to how many decimal places? You pilot always into an unknown future; facts are your single clue. Get the facts!
Robert A. Heinlein