The Masnavi begins with the 'Song of the Reed.' Rumi compares the Ney, which has been cut from its reed-bed, to the soul which has been separated from God and 'cries' through its music to be reunited with its source.

Ghazali wrote this work in Persian as a summary of his larger 'Ihya' (Revival). It explains how the transformation of the self (alchemy) is the only path to true and lasting happiness in both worlds.

Founded by Ahmed al-Rifa'i, this order practiced an intense form of ecstatic Dhikr. These 'miraculous' feats were intended to show the power of Allah and the saint's protection, though they were often criticized by more 'sober' Sufi orders.

Baqa is the stage where the seeker, having undergone Fana (annihilation of ego), returns to the world with a transformed consciousness. They continue their worldly duties but their inner reality is perpetually 'subsisting' in the presence of Allah.

Langar is the communal kitchen. Sufi masters believed that serving the physical needs of people was inseparable from their spiritual growth. Everyone, regardless of creed or status, sat together to eat, breaking down social hierarchies.

Jami (15th century) was a master of the Naqshbandi order. His work summarizes and synthesizes centuries of Sufi poetry and thought, particularly the philosophy of Ibn Arabi, marking the end of the 'classical' era of Persian Sufi literature.

Chilla is derived from the Persian word for 'forty.' It involves a seeker retreating into a secluded cell to engage in intense Dhikr and meditation, following the tradition of Prophets who spent similar periods in seclusion to receive revelation or guidance.

Shahabuddin Suhrawardi 'Maqtul' founded the 'Illuminationist' school. He utilized the symbolism of Light (Nur) and Shadow to describe the hierarchy of existence and the path to spiritual gnosis, a philosophy that deeply influenced later Persian thought.

Founded by Muhammad ibn Ali as-Senussi, this order focused on a return to early Islamic simplicity and social reform. They established a network of centers (Zawiyas) that became the backbone of North African resistance against foreign rule.

Sufis distinguish between 'Maqam' (Station), which is earned through effort, and 'Hal' (State), which is a gift from God. A 'Hal' can be a sudden feeling of joy, expansion, or contraction that descends upon the heart without the seeker's control.