Perfection is reached by the regular practice of concentration, passing through three grades of development:

1. Fana-fi-Shaikh, annihilation in the astral plane,
2. Fana-fi-Rasul, annihilation in the spiritual plane, and
3. Fana-fi-Allah, annihilation in the abstract.
4. After passing through these three grades, the highest state is attained of Baqi-bi-Allah, annihilation in the eternal consciousness, which is the destination of all who travel by this path.