“A hydrogen atom in a cell at the end of my nose was once part of an elephant's trunk. A carbon atom in my cardiac muscle was once in the tail of a dinosaur.”

“All the green in the planted world consists of these whole, rounded chloroplasts wending their ways in water. If you analyze a molecule of chlorophyll itself, what you get is one hundred thirty-six atoms of hydrogen, carbon, oxygen, and nitrogen arranged in an exact and complex relationship around a central ring. At the ring's center is a single atom of magnesium. Now: If you remove the atom of magnesium and in its exact place put an atom of iron, you get a molecule of hemoglobin. The iron atom combines with all the other atoms to make red blood, the streaming red dots in the goldfish's tail.”

“I loved her, atom by atom, one burning cell at a time.”

“Atoms, in short, are very abundant. They are also fantastically durable. Because they are so long lived, atoms really get around. Every atom you possess has almost certainly passed through several stars and been part of millions of organisms on its way to becoming you. We are each so atomically numerous and so vigorously recycled at death that a significant number of our atoms-- up to a billion for each of us, it has been suggested-- probably once belonged to Shakespeare.”

“Every carbon atom in every living thing on the planet was produced in the heart of a dying star.”

“The force that played havoc with the cortisol in my blood was the same force that helped my body recover; if I felt better one day and worse the next, it was unchanged. It chose no side. It gave the girl next to me in the hospital pneumonia; it also gave her white blood cells that would resist the infection. And the atoms in those cells, and the nuclei in those atoms, the same bits of carbon that were being spun into new planets in some corner of space without a name. My insignificance had become unspeakably beautiful to me. That unified force was a god too massive, too inhuman, to resist with the atheism in which I had been brought up. I became a zealot without a religion.”