December 20

From the dawning-place of the divine Tablet the day-star of this utterance shineth resplendent, and it behoveth everyone to fix his gaze upon it: We exhort you, O peoples of the world, to observe that which will elevate your station. Hold fast to the fear of God and firmly adhere to what is right. Verily I say, the tongue is for mentioning what is good, defile it not with unseemly talk. God hath forgiven what is past. Henceforward everyone should utter that which is meet and seemly, and should refrain from slander, abuse and whatever causeth sadness in men. 
- Baha’u’llah  (‘Kitab-i-‘Ahd [Book of the Covenant]; ‘Tablets of Baha’u’llah revealed after the Kitab-i-Aqdas’)