What does Act 1 Scene 3 (Line38 to 88 only), reveal about Macbeth's character and his state of mind in Shakespeare's Macbeth?

Here in this scene, the witches meet Macbeth and Banquo as
they are returning victorious from the battle. Banquo sees the witches and gets confused
as to their identity and intention:

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..................................What are
these

So wither'd, and so wild in their
attire,

That look not like the inhabitants o' the
earth,

And yet are on
't?

Macbeth wants them to
speak. The three witches then hail him one after another as the Thane of Glamis, the
Thane of Cawdor, and as 'that shalt be king hereafter'. These proclamations cast an
instant influence on Macbeth as he 'starts' and seems afraid. Banquo finds Macbeth's
reaction rather unwarranted and himself asks the witches to foretell his future as well.
Banquo is told that he 'shalt get kings'.

As the 'weird
sisters' vanish, Macbeth urges them to stay on and reveal more which suggests Macbeth's
curiosity with regard to the 'supernatural soliciting'. He wants to know how the
witches' prophecies would come true: how he would be the Thane of Cawdor and then the
king. Such things sound improbable to him and yet he is very curious to know prophetic
mystery. As the witches disappear and Macbeth's exhortations remain unanswered, he
significantly expresses his mind: "Would they had stay'd!". He further contemplates on
what the third wich has spoken of Banquo: "Your children shall be
kings".

These lines suggest how the seed of ambition is
already there in Macbeth. The witches only stoke up what is latent in his mind. Macbeth
is startled and frightened to see the hidden interior of his own self as mirrored in the
words of the witches.