June 8

… though he has been made truly grieved to learn of the continued and malignant opposition which the enemies of the Cause in …, and particularly the clerical element, are directing against the believers in that centre. He wishes you, however, to urge the friends not to feel in the least disheartened or discouraged, but to pursue with renewed determination, unity and vigour their sacred task of spreading and establishing the Faith, confident in the glorious future awaiting them. The greater the number of persecutions, and the more intense they become in character, the deeper their faith should be in the unique mission entrusted to them by Bahá’u’lláh, and the greater their zeal to help in hastening its complete fulfilment.

This Cause, as every Divine Cause, cannot be effectively established unless it encounters and valiantly triumphs over the forces of opposition with which it is assailed. The history of the Faith is in itself a sufficient proof of that. Trials and persecutions have always been, and will continue to be, the lot of the chosen ones of God. But these they should consider as blessings in disguise, as through them their faith will be quickened, purified and strengthened. Bahá’u’lláh compares such afflictive trials to the oil which feeds the lamp of the Cause of God. 

- Shoghi Effendi  (From a letter dated 24 June 1936 written on behalf of Shoghi Effendi to an individual believer; compilation: ‘Crisis and Victory’, Compiled by the Research Department of the Universal House of Justice, October 1987; updated 2021 at the Baha’i World center website)