Final answer:
Agatha Fine introduces the Platonic image of the soul that distinguishes between knowledge and opinion, suggesting that true knowledge is found in the realm of pure thought and eternal forms.
Step-by-step explanation:
Agatha Fine introduces the Platonic image of the soul that focuses on the distinction between knowledge and opinion. Socrates explains that when the soul focuses on illuminated truths and what truly exists, it understands and possesses understanding. However, when the soul focuses on things mixed with obscurity and constant change, it opines and lacks understanding. This Platonic image of the soul suggests that true knowledge is found in the realm of pure thought and eternal forms, while opinion is influenced by the physical world and limited experiences.