Whenever philosophy has taken into its plan religion, it has ended in skepticism; and whenever religion excludes philosophy, or the spirit of free inquiry, it leads to willful blindness and superstition.
The first man of science was he who looked into a thing, not to learn whether it furnished him with food, or shelter, or weapons, or tools, armaments, or playwiths but who sought to know it for the gratification of knowing.
There are three classes into which all the women past seventy that ever I knew were to be divided: 1. That dear old soul; 2. That old woman; 3. That old witch.
The whole faculties of man must be exerted in order to call forth noble energies; and he who is not earnestly sincere lives in but half his being, self-mutilated, self-paralyzed.