"These islands meant more to him than any other stop in his five-year voyage around the world." Part 1, Chapter 1, page 4

"The 'Origin of Species' says very little about the origin of species." Part 1, Chapter 1, page 6

"With the conditions of life on this planet changing everywhere faster and faster, the pressures of natural selection are everywhere increasing in intensity, daily and hourly, even on islands as remote as the Galapagos." Part 1, Chapter 1, page 16

"This was the verdict that Darwin had conjectured 'would undermine the stability of Species."' Part 1, Chapter 2, page 28

"The great power of this principle of selection is not hypothetical." Part 1, Chapter 2, page 30

"Stated briefly, the argument is as follows: selection has plainly worked in domesticated races, analogous results and appropriate processes and conditions are found in nature, therefore we may assume that selection works in nature." Part 1, Chapter 2, page 35

"Variations are the cornerstone of natural selection...