Science.
Science is inexorably hostile to supernaturalism—cannot recognize a particle of it. It knows nothing of a super-nature; with science all is nature, and nature is all. From pre-historic times the race has been under the control of ignorance and superstition, the parents of fear and cruelty; but now that science begins to dispel ignorance and superstition, we find courage, kindness, and other humanities taking their places. And we should say just here that Infidelity is no longer synonymous with mere disbelief; it means more than this. It stands for all that reason approves. Freethought is the first fruits of skepticism, and this means honest inquiry on all subjects, old and new. It means independence and manhood in private as well as public life—the right of everyone to think and express his thought regardless of creeds and customs, the right to live his own life in the enjoyment of the broadest possible liberty compatible with the liberty of others. Freethinkers are the prophets of this age, proclaiming justice as the right of all, and predicting a day of wrath to those who trample upon the rights of a long-suffering people. In the light of science, priestcraft must fade away like snow under the increasing heat of the sun.