Letters 70.19

It is in this one matter only that the day will come which will require us to test our training.

You need not think that none but great men have had the strength to burst the bonds of human servitude; you need not believe that this cannot be done except by a Cato,—Cato, who with his hand dragged forth the spirit which he had not succeeded in freeing by the sword. Nay, men of the meanest lot in life have by a mighty impulse escaped to safety, and when they were not allowed to die at their own convenience, or to suit themselves in their choice of the instruments of death, they have snatched up whatever was lying ready to hand, and by sheer strength have turned objects which were by nature harmless into weapons of their own.

Seneca, Letters to Lucilius 70.19, translated by Richard Mott Gummere