Nothing is separate from the source of a creation because no object can exist if the cause from which it has come in to being is removed. Just as, If the clay is removed from a pot made of clay then there is no pot. So too the universe. Iswara happens to be the cause from the stand point of this creation (srishti). Parameswara is "abhinna nimitta upadana karanam" for the "jagat" which pervades the whole creation.The maker and the material being one and the same God is in and through the entire universe. Where is God? the question comes because of the conclusion that the God is located within Space and time as an object. But if we can reshuffle our thinking and enquire into the subject matter we find ourselves the amazing facts about oneself, the universe and God. we have the word Bhagavan for God.In sanskrit it is defined as " ऐश्वर्यस्य समग्रस्य वीर्यस्य यशसः श्रियः।
ज्ञान-वैराग्ययोश्चैव षण्णां भग इतीरणा॥
aiśvaryasya samagrasya vīryasya yaśasaḥ śriyaḥ |
jñāna-vairāgyayoścaiva ṣaṇṇāṁ bhaga itīraṇā ||
all knowledge, jnana; total dispassion, vairagya; the capacity to create, sustain, and resolve, virya; absolute fame, yasas; all wealth, sri; and overlordship, aisvarya. So these six fold qualities in absolute measure is called "bhaga" and so one who has it is bhagavan.