Who are true Baha'is?

Our community health and vigor consists of an abounding faith—a deep, immovable conviction as to the fundamental truths which constitute the Revelation of Bahá’u’lláh. These fundamental truths are precisely those which the Guardian set forth as the qualifications of Bahá’ís:

“Full recognition of the station of the Forerunner, the Author, and the True Exemplar of the Bahá’í Cause, as set forth in ‘Abdu’l-Bahá’s Testament; unreserved acceptance of, and submission to, whatsoever has been revealed by their Pen; loyal and steadfast adherence to every clause of our Beloved’s sacred Will; and close association with the spirit as well as the form of the present day Bahá’í administration throughout the world ...”

Bahá’ís who have accepted these qualifications and not wavered in their devotion to them; Bahá’ís who realize that each individual believer should study and pray in order to remain in the spirit of the Faith, and whole-heartedly uphold the general activities of the Cause—these believers have health of spirit because they remain within the area of nearness where the Holy Spirit sends its beneficent rays.

(Baha'i News, No. 133, February, 1940)

https://bahai.works/Bahá’í_News/Issue_133/Text