I am my own experiment. I am my own work of art.

No matter who you are, no matter what you did, no matter where you've come from, you can always change, become a better version of yourself.

It is mere rubbish thinking, at present, of origin of life; one might as well think of origin of matter.

When we descend to details we can prove that no one species has changed; nor can we prove that the supposed changes are beneficial, which is the groundwork of the theory.

Species of the same genus would occasionally exhibit reversions to lost ancestral characters.

How have all those exquisite adaptations of one part of the organisation to another part, and to the conditions of life, and of one organic being to another being, been perfected?