Discussions must all be confined to spiritual matters that
pertain to the training of souls, the instruction of children, the relief of
the poor, the help of the feeble throughout all classes in the world, kindness
to all peoples, the diffusion of the fragrances of God and the exaltation of
His Holy Word.
(‘Abdu’l-Baha, quoted by Shoghi Effendi, from a letter dated
March 5, 1922; ‘Baha’i Administration’)