But this heart shall break into a hundred thousand flaws 2troOr ere I'll weep. O Fool, I shall go mad
Not only is this foreshadowing but it also shows the lucidity of Lear's current state of mind. Although he is being pushed to the edge, he is still somewhat cognizant of his surroundings. The real turning point of Lear's madness is the kings shouts of anger in the large storm that takes place in act 3 scene 2.