Humans are amphibians – half spirit and half animal. As spirits they belong to the eternal world, but as animals they inhabit time.
— C. S. Lewis, 1898-1963
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.
— W. Winwood Reade, 1838-1875