“The stronger must dominate and not mate with the weaker, which would signify the sacrifice of its own higher nature. Only the born weakling can look upon this principle as cruel, and if he does so it is merely because he is of a feebler nature and narrower mind; for if such a law did not direct the process of evolution then the higher development of organic life would not be conceivable at all.”

“We have been born into a certain Culture, at a certain phase of its organic development, we have certain gifts. These condition the earthly task which we must perform. The metaphysical task is beyond any conditioning, for it would have been the same in any age anywhere. The earthly task is merely the form of the higher task, its organic vehicle.”

“An interesting fiction... however paradoxical the assertion may appear... addresses our love of truth- not the mere love of facts expressed by true names and dates, but the love of that higher truth, the truth of nature and principals, which is a primitive law of the human mind.”

“The theory of evolution by cumulative natural selection is the only theory we know of that is in principle capable of explaining the existence of organized complexity. ”

“The soul of man, left to its own natural level, is a potentially lucid crystal left in darkness. It is perfect in its own nature, but it lacks something that it can only receive from outside and above itself. But when the light shines in it, it becomes in a manner transformed into light and seems to lose its nature in the splendor of a higher nature, the nature of the light that is in it.”

“The scientist does not study nature because it is useful to do so. He studies it because he takes pleasure in it, and he takes pleasure in it because it is beautiful. If nature were not beautiful it would not be worth knowing, and life would not be worth living. I am not speaking, of course, of the beauty which strikes the senses, of the beauty of qualities and appearances. I am far from despising this, but it has nothing to do with science. What I mean is that more intimate beauty which comes from the harmonious order of its parts, and which a pure intelligence can grasp.”