R. Austin Freeman, The Eye of Osiris — XVII. The Accusing Finger (1911)
“ Now, Berkeley, you don't think that, and I hope you don't think that I do. We should be bad biologists and worse physicians if we should underestimate the importance of that which is nature's chiefest care. The one salient biological truth is the paramount importance of sex; and we are deaf and blind if we do not hear and see it in everything that lives when we look abroad upon the world; when we listen to the spring song of the birds, or when we consider the lilies of the field. And as is man to the lower organisms, so is human love to their merely reflex manifestations of sex. ”
