Final answer:
Lepidus speaks the quote about Mark Antony, highlighting Antony's virtues outweighing his faults.
Step-by-step explanation:
The quote 'I must not think there are / Evils enough to darken all his goodness' is spoken by Lepidus about Mark Antony. Lepidus, a member of the Second Triumvirate along with Antony and Octavian (later Augustus Caesar), is emphasizing that despite whatever faults Antony may have, they cannot overshadow his virtues. This line showcases the complexities and the political calculations within the Roman leadership during the turbulent end of the Roman Republic and the onset of the Empire.