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It is interesting to contemplate an entangled bank, clothed with many plants of many kinds, with birds singing on the bushes, with various insects flitting about, and with worms crawling through the damp earth, and to reflect that these elaborately constructed forms, so different from each other, and dependent on each other in so complex a manner, have all been produced by laws acting around us. These laws, taken in the largest sense, being Growth with Reproduction; Inheritance which is almost implied by reproduction; Variability from the indirect and direct action of the external conditions of life, and from use and disuse; a Ratio of Increase so high as to lead to a Struggle for Life, and as a consequence to Natural Selection, entailing Divergence of Character and the Extinction of less-improved forms. Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in this view of life, with its several powers, having been originally breathed into a few forms or into one; and that, whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been, and are being, evolved.

Great is the power of steady misrepresentation; but the history of science shows that fortunately this power does not long endure.

It is easy to specify the individual objects of admiration in these grand scenes; but it is not possible to give an adequate idea of the higher feelings of wonder, astonishment, and devotion, which fill and elevate the mind.

As buds give rise by growth to fresh buds, and these, if vigorous, branch out and overtop on all sides many a feebler branch, so by generation I believe it has been with the great Tree of Life, which fills with its dead and broken branches the crust of the earth, and covers the surface with its ever branching and beautiful ramifications.

The expression often used by Mr. Herbert Spencer of the Survival of the Fittest is more accurate, and is sometimes equally convenient.

The totality of human endeavor is nothing when set against the stars.

There was no center, no reason. Courtney’s death was random, banal viciousness inflicted by one organism upon another. There is no design. The universe isn’t kind or cruel. The universe is vast and indifferent to our desires.

This preservation of favourable variations and the rejection of injurious variations, I call Natural Selection.

You have to be rich to live forever.

What is most threatening and destructive in human society today is the human being who is split in his own nucleus: it is the fission in the modern soul which makes nuclear fission so dangerous — he is a split atom. He has got to heal himself, make himself whole.

Human beings are perhaps never more frightening than when they are convinced beyond doubt that they are right.

There is a way in which the collective knowledge of mankind expresses itself, for the finite individual, through mere daily living: a way in which life itself is sheer knowing.