I laugh at myself.

This idiot girl has suddenly become blind.

Now, incredible as the story seems, it is really true that she is unconscious of her blindness, and consequently begs her attendant to go elsewhere, because the house is dark.

But you may be sure that this, at which we laugh in her, happens to us all; no one understands that he is avaricious or covetous.

The blind seek for a guide; _we_ wander about without a guide." [Footnote 21: It will be observed that the main biographical facts about the life of Seneca are to be gleaned from his letters to Lucilius, who was his constant friend from youth to old age, and to whom he has dedicated his Natural Questions.