Horatio is represented as being a scholar. How does Shakespeare reveal this characteristic in Hamlet?

Hamlet is an allegorical hero.  He interacts with other
characters who reflect his possible options in taking
revenge:

1. Laertes reflects the limitations of
   instant revenge


2. Fortinbras reflects the limitations of
   political revenge


3. Ophelia reflects the limitations of
   madness


4. Horatio reflects the limitations of
   talk

From the very first scenes of the play,
Horatio establishes himself as a talker.  When he first hears of the Ghost, he
says:

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Of that I shall have also
cause to
speak,
And
from his mouth whose
voice will draw on
more;

• Horatio
  doubts the supernatural:

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Tush,
tush, (quiet, quiet) 'twill not
appear.

And

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Well,
sit we
down,
And let us hear
Bernardo speak of
this.

• Marcellus
  says this about Horatio:

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Thou art a
scholar;
speak to it,
Horatio.

And

Question
it,
Horatio.

• Horatio
  tells the Ghost:

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by heaven I charge thee,
speak!

And

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stay!
speak, speak! I
charge thee,
speak!

And

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If thou hast any
sound, or use of
voice,
Speak
to me:
If there be any good thing to be
done,
That may to thee do ease and grace to
me,
Speak to
me:

Later,
after Marcellus says, "We do it wrong, being so majestical,
To offer it the show of violence;" Horatio knows that dialogue and
not violence is the only way to deal with the
world.

When Hamlet sees the Ghost, he follows it.
 Horatio warns against this.  Thus, Horatio is a passive scholar and a doubter.  He is a
man of books, a college student who only believes what he sees, and he can only engage
is discourse, not action.  He is no soldier (like the Ghost), no general (like
Fortinbras), and no passionate reactionary (like Laertes.  In this way, he only offers
Hamlet his advice in words.

Hamlet, thus, makes the mistake
throughout the play of engaging others in dialogue (Polonius, his mother).  Other times,
he doesn't engage in dialogue at all (silent interview with Ophelia).  Certainly, words
contribute to much of Hamlet's delay.