“One may say there is a force like a hundred thousand wedges...”

“I have stated, that in the thirteen species of ground-finches, a nearly perfect gradation may be traced, from a beak extraordinarily thick, to one so fine, that it may be compared to that of a warbler.”

“One day, on tearing off some old bark, I saw two rare beetles, and seized one in each hand. Then I saw a third and new kind, which I could not bear to lose, so I popped the one which I held in my right hand into my mouth. Alas! it ejected some intensely acrid fluid, which burnt my tongue so that I was forced to spit the beetle out, which was lost, as was the third one.”

“...for the shield may be as important for victory, as the sword or spear.”

“more commonly but not exclusively to the like sex. It is a fact of some importance to us, that peculiarities appearing in the males of our domestic breeds are often transmitted, either exclusively or in a much greater degree, to the males alone. A much more important rule, which I think may be trusted, is that, at whatever period of life a peculiarity”

“It is necessary to look forward to a harvest, however distant that may be, when some fruit will be reaped, some good effected.”

“Often a cold shudder has run through me, and I have asked myself whether I may have not devoted myself to a fantasy.”