He that is wise should ever keep in view the (following) six conduits by which counsels become divulged, and he that desireth success and a long dynasty should ever guard himself from those six. They are, intoxication, sleep, inattention to spies, set over one by another, one’s own demeanour as dependent on the working of one’s own heart, confidence reposed on a wicked counsellor, and unskilful envoys.

In plain words: Vidura warns that secret plans leak out in six ways: drunkenness, sleep, not watching for spies, letting your feelings show on your face, trusting a bad adviser, and sending clumsy messengers. A wise person who wants lasting success guards against all six.