1. Spiritual perfection guaranteed

    Wherever you may go to perform your devotional service, you should always be very careful to observe very strictly the rules and regulations. Rise early, attend mangala arati and class, chant 16 rounds, and follow the four regulative principles without deviation. This will guarantee your spiritual perfection.

    (From Srila Prabhupada's letter to Jayahatakosthaka – Tehran 14 March 1975)