According to Osho, God is not a psychological concept or a separate Supreme Being but simply a name for whatever is—the totality of existence. The real work is not believing but inquiring: discovering the unknown center/sources of life within this totality. Religion, for him, is that exploratory search, not a hypothesis accepted on faith.
Call it God or truth—it just means everything that exists, and you find its heart not by believing stories but by honestly exploring.