This is a translation, by Hushmand Fatheazam, of the Letter of the Guardian of the Bahá'í Faith, dated 21 April 1933, addressed to the Bahá'ís of the United States and Canada. In this letter, the Guardian helps the Bahá'ís of North America realize the significance of the spiritual mission entrusted to them by Center of the Covenant and the Successor of Bahá'u'lláh-the Founder of the Bahá'í Cause.