Lord Krishn sings in Bhagavad Gita:
pitāhamasya jagato mātā dhātā pitāmahah
vedyam pavitramonkāra rksāma yajureva ca
It is Sri Krishn who supports the whole world.
He is the “father”
who conceives and gives birth,
who is the ancient source into whom all being also merge at last.
He is worthy of being known as also the sacred OM
which may also be interpreted
the Self’s resemblance to God
(aham+akarah = Omkarah).
That OM (God) is identical with him and so his Self is fit for knowing.
He is also the agent of the three parts of the observance of yog:
Sam-evenness of mind;
Yajur- the ordained yagya
the Supreme Spirit.