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A disposition to preserve, and an ability to improve, taken together, would be my standard of a statesman.

Edmund Burke (1798). “The Beauties of the Late Right Hon. Edmund Burke: Selected from the Writings, &c. of that Extraordinary Man, Alphabetically Arranged ... to which is Prefixed, a Sketch of the Life, with Some Original Anecdotes of Mr. Burke”, p.383
A disposition to preserve, and an ability to improve, taken together, would be my standard of a statesman.