According to Osho, the heart can never be dry; dryness belongs to the head. Your sense of emptiness comes from mistaking thought for feeling, a habit society conditions. God is not proved by intellect but tasted by the heart. Return attention from logic to love, from utility to experience, and the innate longing for the Supreme Beloved will naturally flower.
Your heart isn’t really dry; you’re in your head—shift from thinking to feeling and love for the Divine will bloom by itself.