And therefore are they very dangerous.
I rather tell thee what is to be fear'd
Than what I fear; for always I am Caesar.
Come on my right hand, for this ear is deaf,
And tell me truly what thou think'st of him.

We know hardly any passage more expressive of the genius of
Shakespeare than this. It is as if he had been actually present, had
known the different characters and what they thought of one another,
and had taken down what he heard and saw, their looks, words, and
gestures, just as they happened.

The character of Mark Antony is further speculated upon where the
conspirators deliberate whether he shall fall with Caesar. Brutus is
against it:

And for Mark Antony, think not of him:
For "he can do no more than Caesar's arm,
When Caesar's head is off."

Cassius. Yet do I fear him:
For in th' ingrafted love he bears to Caesar--

Brutus. Alas, good Cassius, do not think of him:
If he love Caesar, all that he can do
Is to himself, take thought, and die for Caesar:
And that were much, he should; for he is giv'n
To sports, to wildness, and much company.

Trebonius. There is no fear in him; let him not die.