O kings of the earth! Give ear unto the Voice of God, calling from this sublime, this fruit-laden Tree, that hath sprung out of the Crimson Hill, upon the holy Plain, intoning the words: ‘There is none other God but He, the Mighty, the All-Powerful, the All-Wise.’... Fear God, O concourse of kings, and suffer not yourselves to be deprived of this most sublime grace. Fling away, then, the things ye possess, and take fast hold on the Handle of God, the Exalted, the Great. Set your hearts towards the Face of God, and abandon that which your desires have bidden you to follow, and be not of those who perish.
- Baha’u’llah (Quoted by Shoghi Effendi, ‘The Promised Day Is Come’)