Among all letters, I (the Supreme) am ‘A’ (the first vowel). Of all compounds (samāsas), I am the dual (dvandva). I am the never-ending Time, and the sustainer with faces everywhere.
See how Krishna enhances the scope for contemplating upon the Supreme’s glories, by including our alphabet, making ‘A’ as the most important and pronounced. The sound issuing from the mouth fully open is ‘A’. No wonder that words starting with ‘A’ are the maximum!
We combine words (especially in Sanskrit) to form compound expressions, ideas and propositions – an art of grammar. In all such compounds, dvandva (the dual) stands the most pronounced.
Krishna refers to Time again, describing it as eternal. Time and causality are interrelated, and the whole Creation rests on cause and effect chain intertwined with time. The Supreme sustains the Creation through Time and causality.