Symbols are objects, characters, figures, and colors used to represent abstract ideas or concepts.
As Lear wanders about a desolate heath in Act 3, a terrible storm, strongly but ambiguously symbolic, rages overhead. In part, the storm echoes Lear’s inner turmoil and mounting madness: it is a physical, turbulent natural reflection of Lear’s internal confusion. At the same time, the storm embodies the awesome power of nature, which forces the powerless king to recognize his own mortality and human frailty and to cultivate a sense of humility for the first time. The storm may also symbolize some kind of divine justice, as if nature itself is angry about the events in the play. Finally, the meteorological chaos also symbolizes the political disarray that has engulfed Lear’s Britain.
Gloucester’s physical blindness symbolizes the metaphorical blindness that grips both Gloucester and the play’s other father figure, Lear. The parallels between the two men are clear: both have loyal children and disloyal children, both are blind to the truth, and both end up banishing the loyal children and making the wicked one(s) their heir(s). Only when Gloucester has lost the use of his eyes and Lear has gone mad does each realize his tremendous error. It is appropriate that the play brings them together near Dover in Act 4 to commiserate about how their blindness to the truth about their children has cost them dearly.