Howbeit your faith seeth but the black side of providence, yet it hath a better side, and God shall let you see it. ... “For we know that all things work together for good to them that love God,” ergo, shipwreck, losses, &c., work together for the good of them that love God: hence I infer, that losses, disappointments, ill tongues, loss of friends, houses, or country, are God's workmen, set on work to work out good to you, out of everything that befalleth you.
On all levels, evolution occurs in response to a crisis situation, not infrequently a life-threatening one, when the old structures, inner or outer, are breaking down or are not working anymore. On a personal level, this often means the experience of loss of one kind or another: the death of a loved one, the end of a close relationship, loss of possessions, your home, status, or a breakdown of the external structures of your life that provided a sense of security.
And so we polish our own lives, creating landscapes and canyons and peaks with the very silt we try to avoid, the dirt we disavow or hide or deny. It is the dirt of our lives—the depressions, the losses, the inequities, the failing grades in trigonometry, the e-mails sent in fear or hate or haste, the ways in which we encounter people different from us—that shape us, polish us to a heady sheen, make us in fact more beautiful, more elemental, more artful and lasting.
Although random mutations influenced the course of evolution, their influence was mainly by loss, alteration, and refinement... Never, however, did that one mutation make a wing, a fruit, a woody stem, or a claw appear. Mutations, in summary, tend to induce sickness, death, or deficiencies. No evidence in the vast literature of heredity changes shows unambiguous evidence that random mutation itself, even with geographical isolation of populations, leads to speciation.