Can you explain the various analogies used in Chapter 17 to illustrate its spiritual teachings?

Chapter 17 of Sai Satcharitra employs several powerful analogies. To distinguish Shreya and Preya, it uses the contrast of light and darkness. The choice of the wise is illustrated by the metaphor of a swan (Maral) that skillfully separates and drinks only pure milk when it is mixed with water. The false nature of worldly existence (Maya) is compared to a mirage or the illusion of silver in a shell. The fleeting value of worldly pursuits is shown through the analogy of gathering pebbles of gold in a dream that vanish upon waking. Finally, the text describes the ultimate union of a seeker with truth by comparing it to a lamp and camphor meeting, where the camphor itself becomes the flame, signifying complete transformation.