“Earth, stars, and the vastness of space; yesterday, today and tomorrow; and the endlessly increasing knowledge of the relation of forces, present an illimitable universe of numberless phenomena. Only in general outline can the universe be understood. In its infinite variety of expression, it wholly transcends the human mind... In the midst of this complexity man finds himself. As he progresses from childhood to manhood, and his slumbering faculties are awakened, he becomes more fully aware of the vastness of his universe and of the futility of hoping to understand it in detail. Nevertheless, conscious man cannot endure confusion. Out of the universal mystery he must draw at least the general, controlling laws that proclaim order in the apparent chaos; and especially is he driven, by his inborn and unalterable nature, to know if possible his own place in the system of existing things. ”

“Man must learn to know the universe precisely as it is, or he cannot successfully find his place in it. A man should therefore use his reasoning faculty in all matters involving truth, and especially as concerning his religion. He must learn to distinguish between truth and error.”

“In order to live, man must act; in order to act, he must make choices; in order to make choices, he must define a code of values; in order to define a code of values, he must know what he is and where he is – i.e. he must know his own nature (including his means of knowledge) and the nature of the universe in which he acts – i.e. he needs metaphysics, epistemology, ethics, which means: philosophy. He cannot escape from this need; his only alternative is whether the philosophy guiding him is to be chosen by his mind or by chance.”

“As our mother earth is a mere speck in the sunbeam in the illimitable universe, so man himself is but a tiny grain of protoplasm in the perishable framework of organic nature. [This] clearly indicates the true place of man in nature, but it dissipates the prevalent illusion of man's supreme importance and the arrogance with which he sets himself apart from the illimitable universe and exalts himself to the position of its most valuable element.”

“It is a secret which every intellectual man quickly learns, that, beyond the energy of his possessed and conscious intellect, he is capable of a new energy (as of an intellect doubled on itself), by abandonment to the nature of things; that, beside his privacy of power as an individual man, there is a great public power, on which he can draw, by unlocking, at all risks, his human doors, and suffering the ethereal tides to roll and circulate through him: then is he caught up into the life of the Universe, his speech is thunder, his thought is law, and his words are universally intelligible as the plants and animals.”

“There is nothing more alone in the universe than man. He is alone because he has the intellectual capacity to know that he is separated by a vast gulf of social memory and experiment from the lives of his animal associates.”