"... they must also guard against the other extreme of never taking part, with other progressive groups, in conferences or committees designed to promote some activity in entire accord with our teachings.”

Abolitionist Meeting 

"The term “politics” can have a broad meaning, and therefore it is important to distinguish between partisan political activity and the discourse and action intended to bring about constructive social change. While the former is proscribed, the latter is enjoined; indeed, a central purpose of the Bahá’í community is social transformation. ‘Abdu’l-Bahá’s treatise The Secret of Divine Civilization amply demonstrates the Faith’s commitment to promoting social change without entering into the arena of partisan politics. So too, innumerable passages in the Bahá’í Writings encourage the believers to contribute to the betterment of the world. “Be anxiously concerned with the needs of the age ye live in,” Bahá’u’lláh states, “and center your deliberations on its exigencies and requirements.” ‘Abdu’l-Bahá urges the friends to “become distinguished in all the virtues of the human world—for faithfulness and sincerity, for justice and fidelity, for firmness and steadfastness, for philanthropic deeds and service to the human world, for love toward every human being, for unity and accord with all people, for removing prejudices and promoting international peace.” Further, in a letter written on his behalf, Shoghi Effendi explains that “much as the friends must guard against in any way seeming to identify themselves or the Cause with any political party, they must also guard against the other extreme of never taking part, with other progressive groups, in conferences or committees designed to promote some activity in entire accord with our teachings”. In another letter written on his behalf in 1948, when racial inequality was enshrined in the laws of many states in the United States, he indicates that there is “no objection at all to the students taking part in something so obviously akin to the spirit of our teachings as a campus demonstration against race prejudice.” Bahá’ís must, therefore, be tireless in addressing, through word and deed, a range of social issues."

The Universal House of Justice citing Bahá'u'lláh, 'Abdul-Bahá and Shoghi Effendi
(From a letter dated 23 December 2008 written on behalf of the Universal House of Justice to an individual believer)