The Duke says, "Lest it see more, prevent it," and he tears out Gloucester's other eye and throws it on the ground. Here Regan says that it was Edmund who betrayed his father and then Gloucester immediately understands that he has been deceived and that Edgar did not wish to kill him.
Thus ends the third act.
The fourth act is again on the heath. Edgar, still attired as a lunatic, soliloquizes in stilted terms about the instability of fortune and the advantages of a humble lot. Then there comes to him somehow into the very place on the heath where he is, his father, the blinded Gloucester, led by an old man. In that characteristic Shakespearean language,—the chief peculiarity of which is that the thoughts are bred either by the consonance or the contrasts of words,—Gloucester also speaks about the instability of fortune. He tells the old man who leads him to leave him, but the old man points out to him that he can not see his way. Gloucester says he has no way and therefore does not require eyes. And he argues about his having stumbled when he saw, and about defects often proving commodities.
