The line in KING LEAR from Kent is actually a bit later, Act 1 scene 4. Now, one comment earlier in this thread, "The arrogance(and stupidity) of the man is staggering.........What a twit!" might stimulate one to respond as it is about Antonio. Perhaps Professor Bevington's introduction to the play is the best. He uses the terms "paradox" and "undoubted ironies." The beginning of the play is also stimulating: "In sooth I know not why I am so sad............And such a want-wit sadness makes of me / That I have much ado to know myself." The phrase "want-wit" allows one to argue that Antonio finds himself "lacking in good sense"(Bevington's gloss). Professor Goddard's comments are also interesting as he suggested that Antonio's sadness may be in part attributable to a long standing romantic passion.