Dyava-prithivyor Idam Antaram

Arjuna looks up and sees that the entire space between heaven and earth — and every direction around it — is filled by Krishna alone. There is no gap. No empty corner. One being, pervading everything. And then a shift in tone: "Seeing this wondrous and fierce form of yours, O Mahatman, the three worlds tremble."

Until now, Arjuna's stuti has been filled mostly with awe — the beauty of garlands, the brilliance of a thousand suns, the majesty of crown and discus. But here, for the first time, the word 'ugram' appears. Fierce. This form is not only magnificent. It is terrifying. The three worlds — heaven, earth, and the realm between — are shaking.

This is the turning point in Arjuna's experience. Wonder is giving way to something deeper and more unsettling. The cosmic form is not a comfortable vision. It is the full truth of reality, and the full truth includes dissolution, destruction, and forces that make even celestial beings tremble. Arjuna has begun to see all of it.

This shloka introduces the element of cosmic fear that will intensify in the coming verses (11.21 onward). The word 'ugram' (fierce) marks a tonal shift — from pure marvel to awe mixed with dread. The three worlds trembling is not a figure of speech; Arjuna is reporting what he sees happening in real time.

The phrase 'dyava-prithivyoh antaram' (space between heaven and earth) refers to the antariksha — the intermediate space that includes the atmosphere, the sky, and everything between the surface of the earth and the celestial realm. Krishna fills even this in-between space entirely.