These strange descriptions of The Lord or the Cosmic Form are to reassure Arjuna as to how the forces are entering into the inescapable mouth of time `kala’ and disappear. Destruction always precedes construction. Here the power of destruction of the Supreme as well as His ugly and bitter forms is given.

The Multiplicity that has risen from the Totality, after its play upon the surface of Truth, must necessarily rush back in all hurry into the very whole from which it had risen up. Arjuna thus observes Bhishma, Karna etc entering into the mouth of the principle of destruction as represented by the Cosmic Form. This sight not only frightens Arjuna but generates in him self-confidence to face the events of future.
In the Universal Form of The Lord wherein He expresses Himself as the entire world of phenomena indicating the principle of oneness, the concepts of space and time disappear. Therefore, when the whole Universe is brought together at the same time and place Arjuna could see the past, present and the future.

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Ca, and; tvam, into You-this is to be connected with ‘rapidly enter’ in the next verse; sarve, all; ami, those; putrah, sons-Duryodhana and others; dhrtarastrasya, of Dhrtarastra; saha, along with; avanipala-sanghaih, multitudes of the rulers (pala) of the earth (avani); also Bhisma, Drona, tatha, and; asau, that; suta-putrah, son of a Suta, Karna; saha, together with; api, even; asmadiyaih, our; yodha-mukhyaih, prominent warriors, the commanders-Dhrstadyumna and others. Moreover,