Would I lay down my life to save my brother? No, but I would to save two brothers or eight cousins.
John B. S. HaldaneAn attempt to study the evolution of living organisms without reference to cytology would be as futile as an account of stellar evolution which ignored spectroscopy.
John B. S. HaldaneThe wise man regulates his conduct by the theories both of religion and science. But he regards these theories not as statements of ultimate fact but as art-forms.
John B. S. HaldaneTeleology is like a mistress to a biologist: he cannot live without her but he's unwilling to be seen with her in public.
John B. S. Haldane