We can conceive of eternity because we cannot conceive of a cessation of time. We can conceive of infinite space because we cannot conceive of so much matter that our imagination will not stand upon the farthest star and see infinite space beyond.
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.