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The Orator persuades and carries all with him, he knows not how; the Rhetorician can prove that he ought to have persuaded and carried all with him.

Thomas Carlyle (1881). “Critical and Miscellaneous Essays: Collected and Republished”, p.5
The Orator persuades and carries all with him, he knows not how; the Rhetorician can prove that he ought to have persuaded and carried all with him.