In the story of the Yogi from Chapter 23, what is the deeper significance of Sai Baba's comment about eating onions?

The comment about onions in Chapter 23 holds a deep, symbolic meaning beyond mere dietary advice. When the Yogi saw Baba eating what he considered impure food—stale bread and an onion—he formed a judgment and doubted Baba's spiritual greatness. Baba's omniscient reply, "only those whose digestion is strong should eat onion," was a direct response to this unspoken doubt. It metaphorically meant that only a being with immense spiritual power, like Baba, could "digest" or transcend worldly things and actions without being affected by them. It demonstrated to the Yogi that his understanding was superficial and that a true saint's state is beyond external appearances and conduct, which led to the Yogi's immediate surrender.