Tragic poetry, which is the most impassioned species of it, strives to carry on the feeling to the utmost point of sublimity or pathos, by all the force of comparison or contrast; loses the sense of present suffering in the imaginary exaggeration of it; exhausts the terror or pity by an unlimited indulgence of it; grapples with impossibilities in its desperate impatience of restraint; throws us back upon the past, forward into the future; brings every moment of our being, or object of nature in startling review before us; and in the rapid whirl of events, lifts us from the depths of woe to the highest contemplation of human life. When Edgar says of Lear, “Nothing but his unkind daughters could have brought him to this”; what a bewildered amazement, what a wrench of the imagination, that cannot be brought to conceive of any other cause of misery than that which has bowed it down, and absorbs all other sorrow in its own! His sorrow, like a flood, supplies the sources of all other sorrow. Again, when he exclaims in the mad scene, “The little dogs and all, Tray, Blanche and Sweetheart, see, they bark at me”, it is passion lending occasion to imagination to make every creature in league against him, conjuring up ingratitude and insult in their least looked-for and most galling shapes, searching every thread and fibre of his heart, and finding out the last remaining image of respect or attachment in the bottom of his breast, only to torture and kill it!

-- WILLIAM HAZLITT, 'On Poetry in General'