Yes. God is one in terms of spiritual context. We can understand god only when we know our true identity. Know thyself, realise thyself. When we understand that we are spirit (soul, atma, ruh. etc....)then only we can be able to understand param atma, Supreme soul. There is a clear demarcation between spirituality and religion according to indian wisdom. Religions are many. but spirituality is one. It brings oneness, one kingdom, one language, one tradition etc. To know more about it learn Rajayoga taught by the Brahma kumaris spiritual university.
