Why does Chapter 23 suggest that it's hard to truly understand a saint's nature just by watching them?

Chapter 23 posits that a saint's true state is incomprehensible through superficial observation because it is "always beyond such things" as their caste, diet, or outward behavior. The text illustrates this with the story of the Yogi who was perplexed to find Sai Baba, a 'King of Yogis,' eating simple bread and onions. This Yogi's expectations were challenged by Baba's ordinary human actions. The chapter explains that saints incarnate out of benevolence for the salvation of souls, and their conduct may not conform to worldly ideas of holiness. Therefore, judging or trying to understand their profound inner state by external criteria is ultimately a futile exercise.