Ramakrishna was a priest at the Dakshineswar Kali temple outside Calcutta. His life was a sequence of intensive experiential engagements with different traditions — as a Vaishnava devotee, as an Advaitin practitioner, as a Muslim faqir, as a Christian at the foot of the cross — each undertaken until direct experience confirmed it.
His conclusion, carried forward by his disciple Swami Vivekananda: all religions are valid paths to the same ultimate. The claim is contested; the experiential commitment behind it remains rare.