The breath is not the ‘God’.+

Some Gurus hold their breath as God.   The "Breath is not God". The breath is not the Self. The breath, body, and the world are created out of single stuff. That single stuff is the Soul, which is present in the form of consciousness.  

Thus, the breadth and breather and the world are part of the illusion created out of single stuff, which is the consciousness. The knowledge of the single stuff is Self-knowledge or Brahma Gnana or Atma Gnana.

The ‘Self is not you. The ‘Self’ is the formless, timeless, and spaceless Soul, which is present in the form of consciousness.  

The breath, breather, and the world are present in the domain of the dualistic illusion.  The dualistic illusion is created out of single stuff. That single stuff is the Soul, which is present in the form of consciousness.

Even the Sunyavada ultimate of the "void" is really a breath, and, therefore, imagination and not the truth.

Sage Sankara:~  The vital- air-Sheath cannot be the Self because it is the modification of air (Vayu). Like air, it enters the body and goes out of it never knowing the joy and sorrow like others. It is ever dependent on the Self.  ~(VC 165-166)

People who hold their breath as the ‘Self’ are still thinking within the domain of form, time, and space.

Thich Nhat Hanh _-"Breath is the bridge, which connects life to consciousness, which unites your body to your thoughts."

But 

Santthosh Kumaar:~ The one can breathe only within the world in which he exists.  The ‘Self is not the one who breathes or the breath.  The breather, breathe and the world in which he exists, is created out of a single clay. That single clay is consciousness. The breather, breathe, and the world in which he exists cease to exist without consciousness. Consciousness can exist with or without the world in which we exist.   consciousness is the ultimate truth or Brahman or God in truth. :~Santthosh Kumaar