'Probably I don’t need to tell you what the text says about how
much merit you collect each time you hear this sutra. Each time you
hear it, how much merit do you collect? First of all, one buddha
has completed the merit of wisdom and the merit of virtue – there
is nothing more to collect…and then how many buddhas? The number of
buddhas equaling the number of sands of grain in the Ganga River
times twelve. And these sand grains are not ordinary grains of
sand. It is explained in the teachings, in the great enlightened
Pabongkha Rinpoche’s notes, that these grains are made of extremely
subtle atoms. There are seven kinds of subtle atoms, water atoms,
earth atoms, and so forth. These sand grains are much, much finer
than what we usually think.
In addition to that, when it comes to talking about the benefits
of bodhichitta, or the benefits of the Arya Sanghata Sutra, the
Ganga does not refer to the Indian River Ganges. It refers to the
Pacific Ocean. Now, that many numbers of buddhas times twelve. The
merit of just one set of buddhas equaling the number of sand grains
in the River Ganga, even just one set – how much merit that is…is
beyond words, unimaginable. Even just the merit that one buddha has
collected is beyond words. So, now, beyond that, the merit that you
collect every time you hear the Arya Sanghata Sutra is equal to
twelve times the merit of the number of buddhas as there are sand
grains in the River Ganga.
So, that is just by hearing it. This means that anyone hearing
it - animals, frogs, birds, so no question about pets like your
beautiful cat, your darling cat, even spirits – collects that much
merit. Can you imagine? It is like an impossible thing in the life
that happens. When those animals, your cat and other animals, hear
you recite Buddha’s teachings, it definitely makes them to receive
higher rebirth and to meet Dharma.''
Kyabje Zopa Rinpoche
http://www.fpmt.org/teachers/zopa/advice/pdf/BensofSanghatastraapr06.pdf