George Santayana, The Life of Reason: Five Volumes in One

"The more pleasure a universe can yield, other things being equal, the more beneficent and generous is its general nature; the more pains its constitution involves, the darker and more malign its total temper. To deny this would seem impossible, yet it is done daily; for there is nothing people will not maintain when they are slaves to superstition; and candor and a sense of justice are, in such a case, the first things lost."