How and why is the public the persona that Iago presents different from the character revealed in his soliloquies

In Shakespeare's play Othello, Iago presents a different persona in his soliloquies for a particular outcome; Iago is Shakespeare's most duplicitous character and this gives him the power through which he can explore ideas of deception, illusion, betrayal and reality. Iago reveals a very different persona to the other characters in the play because it is a large part of his deception with which he wreak's his revenge. It also adds another dimension of reality, as it empowers the audience with knowledge withheld from other characters and creates the sense of tragedy associated with Shakespe…