May 31

If it were possible that in every city a few of the awakened ones, when opportunity offered, could hold a meeting, and therein habitually present the proofs and arguments of God, this would do much to expand the consciousness of men; provided, however, that the discourse be kept to this one theme. 
- ‘Abdu'l-Bahá  (From a Tablet; compilation: ‘Baha’i Meetings’, prepared by the Research Department of the Universal House of Justice)