What is the real meaning of Mantra Pushpam which is chanted at the end of every pooja?

[Shri Ganesh V asked: Padanamaskaram Swamiji, What is the real meaning of Mantra Pushpam, which is chanted at the end of every pooja? (Yo'pam pushpam veda) Does it roughly mean that there is interchangeability between different forms of matter and one who knows this gets some fulfilment in life. If yes, how can knowing the interchangeability between different forms of matter be the source of fulfilment in life? If not the above interpretation, is there any other interpretation to the above verse? At Your divine feet, Ganesh V]

Swami replied:- The entire essence of the Mantra Pushpam is to identify the root source of all the created items. If one identifies that the ultimate God is the unimaginable God or Parabrahman, Who is the Creator, Controller and Destroyer of the entire universe, such a devotee has blessings from the root-source (aayatanam) that is the ultimate Parabrahman. Such a devotee will become stable (aayatanavaan) like a person sitting in his own house. The substratum of created items like water, fire, etc., is the power of Parabrahman only. Such Parabrahman is the unmediated, unimaginable God. The first mediated unimaginable God is God Datta, Who can be taken as Parabrahman directly. Without medium, you cannot even imagine Parabrahman. Hence, God Datta or mediated Parabrahman is recognized in this prayer.