Why does Jocasta say to Oedipus, "Who thou art . . . mayst thou never know" (1106)?
Jocasta says this to Oedipus because Oedipus was a foundling. Jocasta is in fear of what might happen if Oedipus finds out his true birthright.
Jacosta says this because she knows the true identity of Oedipus. She realizes that Oedipus means more to her than her husband.