"There are two kinds of cooperation: material and spiritual"

There are two kinds of cooperation: material and spiritual. Cooperation in the material world will insure happiness and fellowship, and will facilitate the progress of humankind; but the ideal, the most real and virtuous cooperation is spiritual. That is realized when people gather together to investigate and discuss principles impartially, to talk over the divine and philosophic principles of the age and to assist each other in pursuit of divine knowledge and wisdom. This real cooperation and mutual assistance is the foundation on which the super-structure of material reciprocity is based. Through this spiritual inter-assistance the prosperity of the world of man is unveiled. 

- ‘Abdu’l-Baha  (Words of ‘Abdu’l-Baha at a Nineteen-Day Feast in London, December 29, 1912; Baha’i News no. 33, July 1929) (To see the entire talk please visit Talks of ‘Abdu’l-Baha) 

The object of Nineteen-Day Feasts

One of these means of unity and agreement is made possible in this very meeting. The Nineteen Day Feast was inaugurated by the Báb and ratified by Bahá’u’lláh, in His holy book, the Akdás, so that people may gather together and outwardly show fellowship and love, that the divine mysteries may be disclosed. The object is concord, that through this fellowship hearts may become perfectly united, and reciprocity and mutual helpfulness be established. 

- ‘Abdu’l-Baha  (Words of ‘Abdu’l-Baha at a Nineteen-Day Feast in London, December 29, 1912; Baha’i News no. 33, July 1929) (To see the entire talk please visit Talks of ‘Abdu’l-Baha)

Cooperation & mutual helpfulness are the basis of human society

…the members of the world of humanity are unable to exist without being banded together, cooperation and mutual helpfulness is the basis of human society. Without the realization of these two great principles no great movement is pressed forward. 

- ‘Abdu’l-Baha  (Words of ‘Abdu’l-Baha at a Nineteen-Day Feast in London, December 29, 1912; Baha’i News no. 33, July 1929) (To see the entire talk please visit Talks of ‘Abdu’l-Baha)