Macbeth and Banquo, upon learning of the previous thane's fate from the messenger, both marveled at the witch's apparent ability of prophesy, even though Macbeth had already been named the Thane of Cawdor. This influences the two men into believing that their other prophesies will come to pass, and in turn, spurs the rampant Macbeth into action, which causes him to fulfill his own predictions through his own free will, though influenced by the witches" suggestions of a possible kingship. Banquo himself even considered that the witches could be lying to tempt people into indulging in evil deeds when he clearly states,.
"That, trusted home, .
Might yet enkindle you unto the crown,.
Besides the Thane of Cawdor. But "tis strange!.
And oftentimes, to win us to our harm,.
The instruments of darkness tell us truths,.
Win us with honest trifles, to betray's .
In deepest consquence.".
(Act I, scene iii, 120-126).
The witches themselves possess no real power to ensure that their predictions come to pass, and evidence of this is seen during the witches" puerile conversations, as the first garrulous witch relates the tale of the sailor. .
"Weary sev"nights, nine times nine,.
Shall he dwindle, peak, and pine.
Though his bark cannot be lost, .
Yet it shall be tempest-tost".
(Act 1, scene iii, 22-25).
The unbridled witch admits that she cannot completely destroy the ship, but can only wish it to be "tempest-tost." The witches enact this same kind of power to affect the course of events; this shows that the life of Macbeth is not fated to occur, but is directly influenced by the will of specific individuals. .
Another aspect of Macbeth, which clearly shows his own predilection taking precedence over fate, is shown by Macbeth's deliberations and asides he makes while trying to realize his own ambitions, and this is seen in numerous places before the murder of King Duncan and even after. When initially confronted with the prophesy proclaiming him future king, Macbeth became worried with the initial prospect of what would have to happen to Duncan in order for him to assume the throne.