Man? I am a man, thou art a woman -- not by reason of bones and muscles, nerves and brain, which I have in common with apes, and dogs, and horses -- I am a man, thou art a man or woman, not because we have a flesh, God forbid! but because there is a spirit in us, a divine spark and ray which nature did not give, and which nature cannot take away. And therefore, while I live on earth, I will live to the spirit, not to the flesh, that I may be indeed a man.

Lecture on Ancient Civilisation.
1873.