Truth is the mother of joy. Truth civilizes, ennobles, and purifies. The grandest ambition that can enter the soul is to know the truth.
Truth gives man the greatest power for good. Truth is sword and shield. It is the sacred light of the soul.
The man who finds a truth lights a torch.
How is Truth to be Found?
By investigation, experiment and reason.
Every human being should be allowed to investigate to the extent of his desire—his ability. The literature of the world should be open to him—nothing prohibited, sealed or hidden. No subject can be too sacred to be understood. Each person should be allowed to reach his own conclusions and to speak his honest thought.
He who threatens the investigator with punishment here, or hereafter, is an enemy of the human race. And he who tries to bribe the investigator with the promise of eternal joy is a traitor to his fellow-men.
There is no real investigation without freedom—freedom from the fear of gods and men.
So, all investigation—all experiment—should be pursued in the light of reason.
Every man should be true to himself—true to the inward light. Each man, in the laboratory of his own mind, and for himself alone, should test the so-called facts—the theories of all the world. Truth, in accordance with his reason, should be his guide and master.