“Recite ye the verses of God every morn and eventide.” (Bahá’u’lláh, ‘The Kitáb-i-Aqdas’)

April 18

My face hath come forth from the veils, and shed its radiance upon all that is in heaven and on earth; and yet, ye turned not towards Him, notwithstanding that ye were created for Him, O concourse of kings! Follow, therefore, that which I speak unto you, and hearken unto it with your hearts, and be not of such as have turned aside. For your glory consisteth not in your sovereignty, but rather in your nearness unto God and your observance of His command as sent down in His holy and preserved Tablets. 
- Baha’u’llah  (Quoted by Shoghi Effendi in ‘The Promised Day Is Come’; Suriy-i-Muluk [Tablet to the Kings]; ‘Summons of the Lord of Hosts’)