The whole time in the play you could see the prophecy was coming true. It seemed that he was destined no matter what. Oedipus was cursed from birth to someday marry his mother and to murder his father. This prophecy, as warned by the oracle was going to come true (as written in his fate), no matter what he may have done to avoid it. From the beginning, Oedipus Rex was a baby, Lauis and Jocasta found out from the oracle, that Oedipus Rex was going to kill his father and marry his mother.
When Oedipus was born his King Laius – his father -- was told that he is doomed to perish by the hand of his own son. So King Laius had Jocasta kill him off, but she could not do it so she had a servant do it. The servant never killed the boy and instead left him in a field to be left to the fate of the gods. A shepherd brings the boy to Corinth and he is then raised by the childless King Polybus as if he were his own. He learns that he is not the biological son of the king, but his “parents” deny it; blinding Oedipus from the truth.
Oedipus was prophesized to kill his father and marry his mother as warned by the oracle of Apollo. The prophecy would inevitably come to pass, no matter what he might have done to avoid it. His past actions were determined by fate but at the same time his actions in Thebes, he did so on out of his own will. From the beginning, Oedipus took many actions leading to his downfall, Oedipus could have waited for the plague to end, but out of compassion for his people, he had Creon go to Delphi. When he heard Apollo’s prophecy, he could have calmly investigated the murder of King Laius, but in his hastiness, he cursed the murder, and in so, cursing himself.
Jocasta and Laius sent Oedipus away as a child because of a prophecy that he would kill Laius. He was saved and given to Merope and Polybus. Oedipus always thought they were his real parents until he was told of the prophecy. He then set out to find his real parents. On the journey, he kills Laius.
He seemed to make bold, irrational moves to satisfy his fetish of power, which easily could’ve hurried along the prophecy. So it seems that the real question is if his own wrong doings brought upon him his death or fate itself. When Macbeth visited the “weird sisters”, they gave him three apparitions. The first one they told him to beware of Macduff, the second one said that no one woman born shall hurt Macbeth, and the third and final apparition said that the Birnam wood moves against Macbeth. All of these apparitions were eventually proven correct, Macduff (who killed Macbeth) was ripped from his mother’s woom, Macduff and his men used the Birnam forest as camouflage.
After Creon’s law came to pass, Antigone then went ahead and buried her brother, believing she should follow the gods laws instead of her own king’s. Soon after, Creon finds out and sentences her to a stone cell. While in there, Antigone commits suicide and her fiancé Haemon, Creon’s son, finds her dead. As soon as he see’s his love dead he stabs himself so he wouldn’t have to live without her. After the news of those deaths reached Creon’s wife, she became so upset that she killed herself also.
Their own son (who has not been born yet) will grow up, and he will kill his father (King Laois) and marry his mother (Queen Jocaste). In an attempt to not let this prophecy come true the king and queen ordered a peasant to leave Oedipus on the side of a mountain, and this is when the prophecy beings to take its path. The peasant does not leave it on the mountain side, for he would feel guilty to kill an infant. He handed it off to another peasant to bring to his town. One simple trip to an oracle sets the outline of a great ancient Greek tragedy.
The death of Duncan would mean the birth of a new Macbeth, King Macbeth. Lady Macbeth decided to have her husband kill Duncan and said in Act I scene 5, "He croaks the fatal entrance of Duncan." (p.33) This quote says how the presence of Duncan would turn fatal once Macbeth kills him. Once Duncan is killed, Macbeth has second thoughts about the murder of Duncan and his conscience starts to kick in. His wife then puts his conscience at ease.
A prophecy foretold that Oedipus was destined to kill his father and marry his mother. Oedipus killing Laius was free will, though of course he did not realize Laius was his biological father. Oedipus marrying Jocasta was free will, though he did not realize that Jocasta was his biological mother. However, if Oedipus knew that Laius was his father before he had killed him, this would not have changed the matter of Laius' death, just the way in which he had died. Laius was fated to die at the hand of his own son, whether his son knew who his father was or not, and regardless of whether Oedipus had any intention to kill his father.
The witches are being sneaky here to give Macbeth the illusion that he cannot be harmed. Macduff eventually kills Macduff. Does Macduff, who is not born of woman, (his mother passed before he was born) kill Macbeth because of fate? Maybe he does but why does Macduff want to kill Macbeth anyway? Macbeth killed the king and took the throne, so there is an apparent reason that it was Macbeth?s choice.