I deeply appreciate the continued and self-sacrificing endeavours of the American believers in the face of the grave financial and economic depression into which their country and the whole world is now plunged. That the Temple Edifice should arise under such circumstances, that its elaborate and exquisite ornamentation should be carried out, through the efforts of a mere handful of Bahá’í followers despite the gloom, the uncertainty and the dangers which surround them, is but another evidence of the mysterious, all-compelling power of Bahá’u’lláh Whose blessings will be bountifully vouchsafed to all who arise to carry out His purpose. The Cause is entering upon a period of unprecedented achievements. The full measure of its glory and power will be gradually manifested, if we on our part execute in their entirety the instructions and behests bequeathed to us by our beloved Master.
— Shoghi Effendi, Letter dated 20 December 1931 to the National Spiritual Assembly of the United States and Canada