Read it through once

LEONTES. Nor night nor day no rest: it is but weakness To bear the matter thus, mere weakness. If The cause were not in being,—part o’ th’ cause, She th’ adultress; for the harlot king Is quite beyond mine arm, out of the blank And level of my brain, plot-proof. But she I can hook to me. Say that she were gone, Given to the fire, a moiety of my rest Might come to me again. Who’s there?