“Happiness is an accident of nature, a beautiful and flawless aberration.”

“Beautiful young people are accidents of nature, but beautiful old people are works of art.”

“Design in nature is but a concatenation of accidents, culled by natural selection until the result is so beautiful or effective as to seem a miracle of purpose.”

“By many a happy accident.”

“There are no mistakes, only happy accidents.”

“I think it a very happy accident.”

“To what happy accident is it that we owe so unexpected a visit?”

“Our only kiss was like an accident- a beautiful gasoline rainbow.”

“To find accidently a handwritten letter of some old friend in a trunk. Ah, is this not happiness?”

“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.”