He could hear Pa’s voice saying, “A man’s religion, his sect, is his own affair. But those people have no religion or sect. They’re a mob, with a mob… - Leigh Brackett

Hell, how do you think the human race ever learned anything, except by trial and error?"
"But it all takes such a long, long time," said Len."
"Everything takes a long time. Birthing takes nine months, and dying takes you all the rest of your life, and what are you complaining about, anyway?

I guess we've got a lot to learn."
"Quite a lot," said Hostetter thoughtfully. "It won't be easy, either. So many things will jar against every belief you've grown up with, and I don't care how you scoff at it, some of it sticks to you.

I thought they knew," Len said. "I thought they were sure of it."
"Research isn't done that way."
"But how can they spend all that time, and maybe that much more again, if they know it might be all for nothing?"
"Because how would they know if they didn't try? And because there isn't any other way to do it.