History of the Peloponnesian War

An exaggerated belief in the numbers of the conspirators also demoralised the people, rendered helpless by the magnitude of the city, and by their want of intelligence with each other, and being without means of finding out what those numbers really were.

For the same reason it was impossible for any one to open his grief to a neighbour and to concert measures to defend himself, as he would have had to speak either to one whom he did not know, or whom he knew but did not trust.