One shouldn't think too much or too little of himself.
Explanation:
Shakespeare's "Twelfth Night" is an English Renaissance drama that proposes a blend of the main plot and sub-plot where the latter complements the former. This amalgamation helps Shakespeare to convey his message of love more profoundly. He has introduced Sir Andrew along with Maria, Malvolio and Sir Toby to the subplot to add the comic element and the message in the play. <em>It</em> <em>encounters the misadventures of Malvolio that delivers the message that one's preoccupation with self-interest may lead them to a misconception of the world. He suggests that one shouldn't remain over-obsessed with self as it may give rise to the vulnerability to betray one's self as a consequence of the mismatch of one's desire to the ultimate reality.</em>
