“Happens is never once.”

“I'm an old, superstitious Arab, and I believe in our proverbs. There's one that says, 'Everything that happens once can never happen again. But anything that happens twice will surely happen a third time.”

“Evolution is all about processes that almost never happen. Every birth in every lineage is a potential speciation event, but speciation almost never happens, not once in a million births. Mutation in DNA almost never happens — not once in a trillion copings — but evolution depends on it. Take the set of infrequent accidents — things that almost never happen — and sort them into the happy accidents, the neutral accidents, and the fatal accidents; amplify the effects of the happy accidents — which happens automatically when you have replication and competition — and you get evolution.”

“Deep down we've never been who we think we once were, and we only remember what never happened.”

“Remembrance restores possibility to the past, making what happened incomplete and completing what never was. Remembrance is neither what happened nor what did not happen but, rather, their potentialization, their becoming possible once again.”

“It never has happened, and it never will happen, and that is why it is told.”

“A Love like this happens but once in a lifetime”

“Irrelevant things may happen to you, but once they have happened they all become relevant.”

“If such a thing had happened once, it must surely have happened many times in this galaxy of a hundred billion suns.”

“If you never noticed, it never happened.”