BRUTUS:
What said Popillius Laena?

CASSIUS:
He wished today our enterprise might thrive.
I fear our purpose is discoverèd.

BRUTUS:
Look how he makes to Caesar. Mark him.

CASSIUS:
Casca, be sudden, for we fear prevention.—
Brutus, what shall be done? If this be known,
Cassius or Caesar never shall turn back,
For I will slay myself.

BRUTUS:
Cassius, be constant.
Popillius Laena speaks not of our purposes,
For look, he smiles, and Caeser doth not change.

CASSIUS:
Trebonius knows his time, for look you, Brutus,
He draws Mark Antony out of the way.

DECIUS:
Where is Metullus Cimber? . . .

BRUTUS:
He is addressed1. Press near, and second him.

CINNA:
Casca, you are the first that rears your hand

1.already with Caesar

In these lines from act 3.1, the conspirators are preparing to carry out their assassination plot. How does the dialogue between these characters reflect their emotions?