According to Osho, there is no need to know you are the Divine once it is truly realized; knowledge is redundant then. The very sense of 'if' betrays doubt, and that conditionality is the mischief. The only purpose of the search, inquiry, or practice is to dissolve this 'if' so that direct realization replaces conceptual belief.
Once you truly realize you're divine, you stop needing to know; the only reason to search is to remove the 'if' of doubt.