A man can of course hold public office, and many a man does hold public office, and lead a public career of a sort, even if there are other men who possess secrets about him which he cannot afford to have divulged.
 Theodore Roosevelt, Theodore Roosevelt; an Autobiography (1913). copy citation

Context

“Traps were set for more than one of us, and if we had walked into these traps our public careers would have ended, at least so far as following them under the conditions which alone make it worth while to be in public life at all. A man can of course hold public office, and many a man does hold public office, and lead a public career of a sort, even if there are other men who possess secrets about him which he cannot afford to have divulged. But no man can lead a public career really worth leading, no man can act with rugged independence in serious crises, nor strike at great abuses, nor afford to make powerful and unscrupulous foes, if he is himself vulnerable in his private character.” source