No matter which way I go I know now that I will never have peace. For peace is certainty, and there is no certainty but death. - 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?

But for today, yesterday, tomorrow, it is not important. Time goes on without any of us. Only a belief, a state of mind, endures, and even that changes constantly, but underneath there are two main kinds—the one that says, Here you must stop knowing, and the other which says, Learn.
Right or wrong, the fruit was eaten, and there can’t ever be a going back.
I have made my choice.

Why did they do it?" he asked.
"Because they're afraid."
"Of what?"
"Of yesterday," said Mr. Hostetter. "Of tomorrow.