I will live by the standard of reason, and if thinking in accordance with reason takes me to perdition, then I will go to hell with my reason rather than to heaven without it.
Courage without conscience is a wild beast.
Hope is the only universal liar who never loses his reputation for veracity.
There is no common sense in going to the field to fight and leaving a man at home to undo all that you accomplish.
There can be but little liberty on earth while men worship a tyrant in heaven.
Reason, observation, and experience; the holy trinity of science.