“It would be wiser for the Bahá'ís to use the meditations given by Bahá'u'lláh and not use any set form of meditation given by someone else."

Bahá'ís have the bounty of having the prayers revealed by the Manifestations of God, the Báb and Bahá'u'lláh, as well as by 'Abdu'l-Bahá, which guide us in our devotions, but there is no prohibition of the reading of prayers or selections from the Sacred Writings of other religions. However, the Guardian stated, "It would be wiser for the Bahá'ís to use the meditations given by Bahá'u'lláh and not use any set form of meditation given by someone else." 

- The Universal House of Justice  (From a letter dated 14 September 1982, written on behalf of the Universal House of Justice to an individual believer; Compilation ‘Selected Guidance concerning Devotional Gatherings)