As men, whose intentions require no concealment, generally employ the words which most directly and aptly express the ideas they intend to convey, the enlightened patriots who framed our constitution, and the people who adopted it, must be understood to have employed words in their natural sense, and to have intended what they have said.

22 U.S. (9 Wheaton) 1, 188 - Gibbons v. Ogden (1824)