Using these lines from act i and act iv, explain how the macbeth described in the beginning of the play is different from the macbeth who is speaking these lines in act iv. act i soldier but all's too weak; for brave macbeth,—well he deserves that name,— disdaining fortune, with his brandish'd steel, which smok'd with bloody execution, like valor's minion, carv'd out his passage till he fac'd the slave; and ne'er shook hands, nor bade farewell to him, till he unseam'd him from the nave to the chaps, and fix'd his head upon our battlements. duncan. o valiant cousin! worthy gentleman! act iv macbeth. time, thou anticipat'st my dread exploits: the flighty purpose never is o'ertook unless the deed go with it: from this moment the very firstlings of my heart shall be the firstlings of my hand. and even now, to crown my thoughts with acts, be it thought and done: the castle of macduff i will surprise; seize upon fife; give to the edge o' the sword his wife, his babes, and all unfortunate souls that trace him in his line. no boasting like a fool; this deed i'll do before this purpose cool: but no more sights! —