June 15. On this date in 1935, Shoghi Effendi stated "it is only too obvious that in most of its fundamental assumptions the Cause of Bahá'u'lláh is completely at variance with outworn creeds, ceremonies and institutions. To be a Bahá'í and at the same time accept membership in another religious body is simply an act of contradiction that no sincere and logically-minded person can possibly accept. To follow Bahá'u'lláh does not mean accepting some of His teachings and rejecting the rest. Allegiance to His Cause must be uncompromising and whole-hearted"

June 15. On this date in 1935, Shoghi Effendi stated "it is only too obvious that in most of its fundamental assumptions the Cause of Bahá'u'lláh is completely at variance with outworn creeds, ceremonies and institutions. To be a Bahá'í and at the same time accept membership in another religious body is simply an act of contradiction that no sincere and logically-minded person can possibly accept. To follow Bahá'u'lláh does not mean accepting some of His teachings and rejecting the rest. Allegiance to His Cause must be uncompromising and whole-hearted"

1396. Membership in Non-Bahá'í Religious Organizations
"Concerning membership in non-Bahá'í religious associations. The Guardian wishes to re-emphasize the general principle already laid down in his communications to your Assembly and also to the individual believers that no Bahá'í who wishes to be a wholehearted and sincere upholder of the distinguishing principles of the Cause can accept full membership in any non-Bahá'í ecclesiastical organization. For such an act would necessarily imply only a partial acceptance of the Teachings and laws of the Faith, and an incomplete recognition of its independent status, and would thus be tantamount to an act of disloyalty to the verities it enshrines. For it is only too obvious that in most of its fundamental assumptions the Cause of Bahá'u'lláh is completely at variance with outworn creeds, ceremonies and institutions. To be a Bahá'í and at the same time accept membership in another religious body is simply an act of contradiction that no sincere and logically-minded person can possibly accept. To follow Bahá'u'lláh does not mean accepting some of His teachings and rejecting the rest. Allegiance to His Cause must be uncompromising and whole-hearted...."
(From a letter written on behalf of Shoghi Effendi to the National Spiritual Assembly of the United States and Canada, June 15, 1935)