"For all species, including our own, the true figure of life is a perching bird, a passerine, alert and nervous in every part, ready to dart off in an instant. Life is always poised for flight. From a distance it looks still, silhouetted against the bright sky or the dark ground; but up close it is flitting this way and that, as if displaying to the world at every moment its perpetual readiness to take off in any of a thousand directions."

“We do not lift a finger without three kinds of information: the information we are getting from our senses at that moment; the information we have gotten from our senses in the past; and the information our ancestors have acquired since life began on Earth—that is, the information that is represented by genes themselves. Evolution is learning. Species store learning in chromosomes the way individuals store learning in their brains and societies store learning in books.”

“One test of a true clock is its ability to keep time through a wide range of temperatures. A clock that speeds up in hot weather and slows down in cold weather is not a clock, although it may make a good thermometer.”

“All times seem special to those who live in them.”

“The rapid accumulation of change is not always progress, and forward motion is not always an advance.”

““Our only real competition for domination of the planet remains the viruses,” the microbiologist Joshua Lederberg once said. “The survival of humanity,” he added, “is not preordained.”

“With the discovery of the clock gene, the sense of time, mysterious for so many centuries, was no longer a mystery that could be observed only from the outside. Now it could be explored as a mechanism from the inside. The discovery implied that behavior itself could now be charted and mapped as precisely as any other aspect of inheritance. Qualities that people had always thought of as somehow floating above the body, apart from the body, as if they belonged to the realm of the spirit and not of the flesh, as if they were supernatural, might be mapped right alongside qualities as mundane as eye pigment.”