Regarding, in particular, teaching the Cause of God, from a letter written on behalf of the beloved Guardian, we are reminded that it is a sacred obligation enjoined upon every believer.
“Bahá’u’lláh has enjoined upon the Bahá’ís the sacred obligation of teaching. We have no priests, therefore the service once rendered by priests to their religions is the service every single Bahá’í is expected to render individually to his religion. He must be the one who enlightens new souls, confirms them, heals the wounded and the weary upon the road of life, and gives them to quaff from the chalice of everlasting life—the knowledge of the Manifestation of God in His Day.
“Further, Bahá’u’lláh exhorts us to "Teach thou the Cause of God with an utterance which will cause the bushes to be enkindled, and the call ‘Verily, there is no God but Me, the Almighty, the Unconstrained’ to be raised therefrom."
While living the Bahá'í life, good works and service to our fellow men are important aspects in exemplifying and promoting the Faith, ‘Abdu'l-Bahá emphasizes that these alone are not sufficient. He states:
“It is at such times that the friends of God avail themselves of the occasion, seize the opportunity, rush forth and win the prize. If their task is to be confined to good conduct and advice, nothing will be accomplished. They must speak out, expound the proofs, set forth clear arguments, draw irrefutable conclusions establishing the truth of the manifestation of the Sun of Reality.”
- The Universal House of Justice (From a letter dated 22 April 1996, written on behalf of the Universal House of Justice to an individual believer; Messages from the Universal House of Justice 1986-2001)