Most characters in this play are found out to be involved in a case of deception, in one way or another.
The theme runs consistent throughout the play, and is one of the main motives behind much of the action that takes place.
The first visible sign of deception is seen with the first Thane of Cawdor, who was found out to have betrayed king Duncan.
According to Duncan, the Thane of Cawdor was a man who had earned his Highnesses deepest respect.
He is found out to have betrayed information to an opposing force, which lead to his execution.
This event leads the king to state "There's no art/ To find the mind's construction in the face:/ He was a gentleman on whom I built/ An absolute trust"(Act IV, Scene I, ln 13-14).
This quote sets up the whole theme for the play: you can not tell what a man is really thinking, only by looking at his outer appearance.
Deception through false prophesies is also seen within this play.
Near the start of the story, the three Witches give Macbeth a prophecy.
In all simplicity, they state that Macbeth shall be given the title of being the Thane of Cawdor, Macbeth will be king, and so will the children of Banquo.
When one of their predictions come true (almost immediately), Macbeth begins to ponder on what action he should take.
Later on in the story, it is revealed that the Witches plan on giving all the power he wants, and then take him down.
Although the witches are usually highly ambiguous about what the true meaning behind their words are, their motives are best exemplified in conversation among themselves.
This is best exemplified by Hecate, when she states: "As, by strengths of their illusion, Shall draw him on to his confusion:/ He shall spurn fate, scorn death, and bear/ His hopes above widom, grace and fear:/ is mortals chifiest enemy".
(Act III, Scene V, ln 28 - 30).
This is simply stating that they will give Macbeth a false sense of security, and then take advantage of him, to bring him to his downfall of power.
A seemingly loyal man to the king, Macbeth's ambitious drive begins to take effect.
He reveals his ambition through a small aside, where he sees himself killing Duncan: "If good, why do I yield to that suggestion/ Whose horrid image doth unfix my hair" (Act I, Scene III, Ln 145).
As the play progresses, it is revealed that Macbeth has always had ambition to be more powerful, and with the witches prophesies, he sees an opportunity to do so.
With all considered, it is true to say that Macbeth is completely packed with deception and betrayal.
Near the start of the play, those who are good and noble appear to succumb to those who are filled with deception (ie: Duncan getting killed by Macbeth).
As the play progresses, it appears that those who cause wrong receive justice, by getting deceived themselves.
In summary, this play demonstrates that deception can lead one to power and fortune, and at the same time, cause their downfall.