1. vairagya-vidya

    We must always remember that a devotee's life is one of vairagya-vidya, or renunciation and knowledge. Therefore all devotees are warned not to live unnecessarily luxurious lives at the cost of others. Grhasthas living within the jurisdiction of the temple must be especially careful not to imitate karmis by acquiring opulent clothing, food and conveyances. As far as possible, these should be avoided. A member of the temple, whether grhastha, brahmacari or sannyasi, must practice a life of renunciation, following in the footsteps of Haridasa Thakura and the Six Gosvamis. Otherwise, because maya is very strong, at any time one may become a victim of maya and fall
    down from spiritual life.

    (From Srila Prabhupada's purport to Cc Antya 3.101)