Read it through once

MACBETH. Stay, you imperfect speakers, tell me more. By Sinel’s death I know I am Thane of Glamis; But how of Cawdor? The Thane of Cawdor lives, A prosperous gentleman; and to be king Stands not within the prospect of belief, No more than to be Cawdor. Say from whence You owe this strange intelligence? or why Upon this blasted heath you stop our way With such prophetic greeting?—Speak, I charge you.