It is disturbing to discover in oneself these curious revelations of the validity of the Darwinian theory. If it is true that we have sprung from the ape, there are occasions when my own spring appears not to have been very far. – Cornelia Otis Skinner

Darwinian man, though well-behaved, at best is only a monkey shaved. – W. S. Gilbert

All the evolution we know of proceeds from the vague to the definite. – Charles Sanders Peirce

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