With his new knowledge, Lear would be a more effective king. But because he has given up his royal position, he can take responsibility only for his present situation. His inability to right the wrongs he has inflicted upon his people contributes to his fall into madness. The turmoil in Lear's mind makes him oblivious to the weather storm that surrounds him, and his waning lucidity also provides an escape from the reality of his plight.
When Poor Tom emerges from the hovel, Lear sees a mirror image of himself. Lear identifies with Poor Tom because both men have lost everything. Lear imagines that Tom is also the victim of deceitful and cruel daughters. Lear's identity with Tom is absolute when he removes his clothing to join Tom in near-nakedness. This inability to distinguish himself from Tom is a symptom of Lear's madness. This scene reminds the audience that very little separates man from beast. The fragility of man is inescapable, because only a fine line divides civilized and uncivilized states.
Although parallels can be drawn between Gloucester's situation and Lear's circumstances (as both men are being manipulated by their children), one notable difference remains: Gloucester retains his sanity. Gloucester is aware of how easily he might lose his mind, and he fears it may happen yet (III.4.62–63), but he has an inner strength that Lear does not have, which permits him to survive.
Paradoxically, Gloucester fails to recognize his own son, Edgar, disguised as Poor Tom. This scene builds upon Scene 3 by showing Gloucester's determination to help the old king, but it also reveals a father in as much pain as the king. Gloucester is not aware that his own situation will turn disastrous soon.
