History of the Peloponnesian War

Their hearts failed them because they thought the conspirators more indeed than they were; and to learn their number, in respect of the greatness of the city and for that they knew not one another, they were unable.

For the same cause also was it impossible for any man that was angry at it to bemoan himself, whereby to be revenged on them that conspired; for he must have told his mind either to one he knew not or to one he knew and trusted not.

For the popular approached each other, every one with jealousy, as if they thought him of the plot. For indeed there were such amongst them as no man would have thought would ever have turned to the oligarchy; and those were they that caused in the many that diffidence, and by strengthening the jealousy of the popular one against another, conferred most to the security of the few.