5 levels outlined in Bhaktivinoda Thakura’s essay “On the Pure Religion of the Bhagavata”:
1. Shaktism – Worship of nature
2. Sauryaism – Worship of sun
3. Ganapatyaism – Worship of consciousness manifested in animals
4. Shaivism – Worship of consciousness manifested in humans
6. Vaishnavism – Worship of the Supreme Person