paraphrase this paragraph

(Macbeth is a complex character who changes throughout the course of the play. He is clearly a brave warrior and leader at the start of the drama but he falls victim to the Witches' predictions. It is unclear whether they plant ideas in his mind or whether they simply highlight thoughts that he has already had. In a series of soliloquies he repeatedly questions himself about his motives for killing the King but is eventually persuaded to continue by his forceful wife.Having committed murder he finds himself caught in a spiral of evil from which he can see no escape. His actions become less heroic and more cowardly as he continues to murder and terrorise others in order to hold on to his power. Towards the end of the play, when he realises that he is doomed, he briefly returns to his old heroic self.)