The only race I know is the human one.
There's no question dolphins are smarter than humans as they play more.
There is only one road to human greatness: through the school of hard knocks.
Berlin is the place to which I am most closely bound by human and scientific ties.
Those instrumental goods which should serve to maintain the life and health of all human beings should be produced by the least possible labour of all.
Applying the axioms of physical science to human life has something reprehensible to it.