Daylight and champaign discovers not more. This is open. I will be proud, I will read politic authors, I will baffle Sir Toby, I will wash off gross acquaintance, I will be point-device the very man. I do not now fool myself, to let imagination jade me; for every reason excites to this, that my lady loves me. She did commend my yellow stockings of late, she did praise my leg, being cross-gartered, and in this she manifests herself to my love, and with a kind of injunction drives to these habits of her liking. I thank my stars, I am happy. I will be strange, stout, in yellow stockings, and cross-gartered, even with the swiftness of putting on. Jove and my stars be praised.

Well, Malvolio just said this after he found the letter written by Maria which said that Olivia was in love with him. He wanted and dreamed to be loved by Olivia and be a nobleman. For me this dream was full filled with the letter and for the audience this scene was really funny, since Malvolio was a fool of himself when he followed the letter's instructions. Also, we have a hint of pathos in the situation of Malvolio because his ambitions crashed down. The audience felt pity of him because of the things that happened to him, for example, when sir Toby and Maria used his preposterous behavior to lock him away as a madman.