original_query: What is the significance of ʿAṭṭār of Nishapur in Persian poetry and Sufism?
query: What is the significance of ʿAṭṭār of Nishapur in Persian poetry and Sufism?
answer: ʿAṭṭār of Nishapur had an immense and lasting influence on Persian poetry and Sufism.  He was a Persian poet, theoretician of Sufism, and hagiographer whose works reflect the evolution of the Sufi movement and blend Sufi sources with other ascetic legacies. His works are considered valuable sources on the hagiology and phenomenology of Sufism, though not necessarily reliable for historical details.