A true Cynic who prepares himself this way can't stop there. He must realize that Zeus has sent him as a messenger to humanity. His job is to teach people about good and bad things. He shows them they've been looking for happiness and suffering in all the wrong places. They never think to look where these things actually are. He's like a spy — just as Diogenes was captured and taken to Philip after the battle of Chaeroneia as a spy. A Cynic is indeed a spy who watches what is truly good for people and what is truly evil. His duty is to examine things carefully, then come back and report the truth. He must not panic and wrongly identify enemies where there are none. He can't let appearances disturb him or confuse him in any way.
Then, if he is thus prepared, the true Cynic cannot be satisfied with this; but he must know that he is sent a messenger from Zeus to men about good and bad things, to show them that they have wandered and are seeking the substance of good and evil where it is not, but where it is, they never think; and that he is a spy, as Diogenes was carried off to Philip after the battle of Chaeroneia as a spy. For in fact a Cynic is a spy of the things which are good for men and which are evil, and it is his duty to examine carefully and to come and report truly, and not to be struck with terror so as to point out as enemies those who are not enemies, nor in any other way to be perturbed by appearances nor confounded.