It is impossible, no matter how much care is used, to prevent the occasional appointment to the public service of a man who when tempted proves unfaithful; but every means should be provided to detect and every effort made to punish the wrongdoer.
 Theodore Roosevelt, State of the Union Address. copy citation

Context

“Such officer or employe owes the duty to the United States to guard carefully and not to divulge or in any manner use, prematurely, information which is accessible to the officer or employe by reason of his official position. Most breaches of public trust are already covered by the law, and this one should be. It is impossible, no matter how much care is used, to prevent the occasional appointment to the public service of a man who when tempted proves unfaithful; but every means should be provided to detect and every effort made to punish the wrongdoer. So far as in my power see each and every such wrongdoer shall be relentlessly hunted down; in no instance in the past has he been spared; in no instance in the future shall he be spared. His crime is a crime against every honest man in the Nation, for it is a crime against the whole body politic.” source