December 1. On this date in 1935, a letter written on behalf of Shoghi Effendi to the National Spiritual Assembly of the United States and Canada stated "that although Abdu'l-Bahá's station is not that of a Manifestation of God, nevertheless supplications may be addressed to Him. It is essential, however, that every believer should realize that while doing so he is directing his thoughts towards the Master as an intermediary between him and the Manifestation."

December 1. On this date in 1935, a letter written on behalf of Shoghi Effendi to the National Spiritual Assembly of the United States and Canada stated "that although Abdu'l-Bahá's station is not that of a Manifestation of God, nevertheless supplications may be addressed to Him. It is essential, however, that every believer should realize that while doing so he is directing his thoughts towards the Master as an intermediary between him and the Manifestation."

1621. Praying to Abdu'l-Bahá
"...he wishes me to explain that although Abdu'l-Bahá's station is not that of a Manifestation of God, nevertheless supplications may be addressed to Him. It is essential, however, that every believer should realize that while doing so he is directing his thoughts towards the Master as an intermediary between him and the Manifestation, and not as the Source of Divine Revelation and spiritual guidance. Provided this distinction is clearly established there can be no harm or objection in addressing prayers to Abdu'l-Bahá."
(From a letter written on behalf of the Guardian to the National Spiritual Assembly of the United States and Canada, December 1, 1934: Bahá'í News, No. 89, February 1935, p. 4)