If someone ever come up to me, and tell me my future,
I'll somehow believe it.
But at the same time,
I will just make a note in mind that it will happen,
and just continue my daily life.
Intentionally making a 'prophecy' happen is really foolish in my opinion.
I mean.. It won't be a prophecy if you make it happen intentionally!
It will be like delibretly satisfying someone's words.

I think that Macbeth trust the witches too much,
resulting his murder and death.
Macbeth shouldn't have killed King Duncan.
Due to his impatience, he committed murder.