There are several.

1) everyone can attain it.
As it is the basic nature, it is inherent.

2) infinite peace, bliss, and consciousness

3) it calls to be shared

As it is the most beautiful and highest,
it calls to be shared,

it calls that all should have it.

4) it is simple, all can know it.

as well as all should know it,
it calls that all Can know it,
that it is simple,
and all can understand it.