Nirguna is one of the schools of thought in Hinduism. The Nirguna Bhakti School
of thought believed in formless god – Nirguna Brahman. Sant Kabir is one of the
founders of the Nirguna School of Bhakti and conceived Bhagvan Sri Ram as a formless
God.
Nirguna School of Bhakti was split into two groups.
The first group gave importance to knowledge and had an
intellectual approach.
The second group believed in love and attachment and total
surrender to Brahman (God) for attaining That. This group was the mystics.
Brahman is the concept of God in Hinduism. Brahman cannot be
described or imagined. Only that exists.