Gārgī and Yājñavalkya:

Gārgī v. Yājñavalkya:

The Debate of Gārgī and Yājñavalkya: A poignant dialogue in the Bṛhadāraṇyaka Upaniṣad illuminates this mystery further. Gārgī, the philosopher-seer, enters into a profound debate with Yājñavalkya on the origins of creation. She asks, step by step: 
“How did the earth arise? Who created Agni? Who created Indra? Who made Ākāśa?” 

Each time, Yājñavalkya traces the cause back — until all resolves into Ātman. Yet Gārgī persists: “Then who created Ātman?” 

At this, the sage does something uncharacteristic of his calm nature. He warns, “Ask any further, and your head will burst into a thousand pieces.” 

Remarkably, Gārgī does not take offence. She bows with gratitude, recognising that she has been answered — not with explanation, but with truth. 

Yājñavalkya’s warning that one’s head would “burst into a thousand pieces” is a perfect metaphor for the overthinking mind —  
too many unanswered questions create knots of thought, leading to fatigue, anxiety, and despair. 
From cynicism, one easily slides into nihilism. 

As U. G. Krishnamurti once said: 

“Questions on purpose, creation, and meaning are the mind’s attempt to prolong the life of the questioner. The answer is what he fears. With each new question, the mind buys time to survive within the flood of being.” 

In the end, perhaps silence itself is the only true answer. When Gārgī accepted that silence as wisdom, she, too, was right.