Men prefer to believe that they are degenerated angels, rather than elevated apes.

Doubt is the offspring of knowledge: the savage never doubts at all.

Christians believe themselves to be the aristocracy of heaven upon earth, they are admitted to the spiritual court, while millions of men in foreign lands have never been presented. They bow their knees and say they are 'miserable sinners,' and their hearts rankle with abominable pride. Poor infatuated fools! Their servility is real and their insolence is real but their king is a phantom and their palace is a dream.

The philosophic spirit of inquiry may be traced to brute curiosity, and that to the habit of examining all things in search of food. Artistic genius is an expansion of monkey imitativeness.

We live between two worlds; we soar in the atmosphere; we creep upon the soil; we have the aspirations of creators and the propensities of quadrupeds. There can be but one explanation of this fact. We are passing from the animal into a higher form, and the drama of this planet is in its second act.

Our enlightened posterity will look back upon us who eat oxen and sheep, just as we look upon cannibals.

And then, the Earth being small, mankind will migrate into space, and will cross the airless Saharas which separate planet from planet and sun from sun. The Earth will become a Holy Land which will be visited by pilgrims from all the quarters of the Universe. Finally, men will master the forces of Nature; they will become themselves architects of systems, manufacturers of worlds.