In Chapter 12, saints are called 'the Agastya for the ocean of worldly existence' and 'the sun for the darkness of ignorance.' What do these metaphors mean in the context of the chapter?

These powerful metaphors in Chapter 12 explain the profound role of a saint. The comparison to Agastya, the sage who famously drank the entire ocean, signifies that a saint has the capacity to help a devotee overcome the vast and overwhelming ocean of worldly existence (samsara). They effectively 'drink' or absorb the devotee's troubles. The metaphor of being "the sun for the darkness of ignorance" illustrates that saints dispel spiritual ignorance with the light of their wisdom and guidance. As Chapter 12 explains, they achieve this by guiding all beings, including the ignorant and the wicked, onto the right path through their immense compassion and by helping devotees cultivate unwavering faith.