According to Osho, deep sadness often appears when old negativity, fixed ideas, and familiar miseries are falling away. You mistake the loss of these long-time 'companions' for emptiness, but it is actually new spaciousness. If you stop labeling it as empty and allow it, that spaciousness becomes a temple for life (God) to enter, transforming sorrow into openness.
Your sadness means old pains are leaving; if you don’t cling or call it “empty,” the space they leave becomes a fresh room where joy can come.