LANGUAGE CAN FAIL US

Advaita Vedanta is non-dualistic meaning that God is not something other than us. Tat tvam asi, That Art Thou, means that we are God and God is us.  Yet this Tat tvam asi concept is difficult to grasp.  The problem is language. 

A sentence is comprised of a subject and an object.  The subject and object are not the same thing, cannot be the same thing. 

Tat tvam asi, however, is not about what is grammatically logical.  It is a non-dualistic statement, understood on the same level as knowing  that water is cold when you put your hand in it, to use a Zen analogy.

Language is useful as a means of pointing to something.  We cannot communicate without it.  But it can fail us, as in this instance.