In Tamil, we use the word கடவுள் (kadavul) to indicate God. நம்மைக் கடந்தும் (kada) நமக்கு உள் (ul) இருப்பதுவே கடவுள் (Meaning that the one which is away from us and yet inside us is God). A very simple word with very deep meaning. One can keep contemplating on this word alone. Deeper introspection will drive us to the concept of Infinity. Talking about infinity from a philosophical perspective will take us directly to this very famous Sloka (Hymn). This śloka is from the Bṛhadāraṇyaka Upanishad and forms the mangalācarana mantra (Shanthi Sloka) for the Īśāvāsya Upanishad.
Excerpts from various commentaries on this sloka is summarised as understood by me in https://soundar53.substack.com/p/infinity