The mind cannot be securely anchored. If we do not advance, we go backward. If we do not grow, we decay. If we do not develop, we shrink and shrivel.
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.