According to Osho, in bhakti love cannot arise in isolation; it needs the 'other.' The guru—embodying and symbolizing the Divine—is indispensable, the second bank that lets the current of love flow. Meditation may proceed alone, but devotion requires this living presence: through the guru one tastes, recognizes, and reaches God; without him, the bhakti 'happening' does not happen.
In devotion, love needs someone real to love—your guru—who shows you God; you can’t do bhakti alone.