| Quote #1
From the first sign that things might not be rosy, Sebastian shows he has no loyalty to his brother or his king (Alonso is both). He has a partner in callousness in Antonio – this foreshadows their later treachery on the island.
| Quote #2
Prospero has the distance and perspective of wisdom when thinking about how they ended up on the island. Antonio's treachery put them there, but the help of the natural elements, and Gonzalo's loyalty, allowed them to survive and prosper.
| Quote #3
Prospero values the brotherly bond more than Antonio; Prospero assumed his brother would be loyal to him. Instead, Antonio learned all the tricks of political treachery while serving in the place of Prospero, and used them to betray his brother.