The Parasite Tychiades (55)

Moreover, all the philosophers and rhetoricians, to a man, are particularly timid. At all events you will find that most of them appear in public with a staff —of course they would not have armed themselves if they were not afraid—-and that they lock their doors very securely for fear that someone might plot against them at night. The parasite, however, casually closes the door of his lodgings, just to prevent it from being opened by the wind, and when a sound comes at night, he is no more disturbed than as if it had not come, and when he goes through unfrequented country he travels without a sword; for . he does not fear anything anywhere. But I have often seen philosophers armed with bows and arrows when there was nothing to fear; and as for staves, they carry them even when they go to the bath and to luncheon.