"Whoso is deprived of courtesy walketh naked among men, though he be clothed in all the world’s silk."

 

Michelangelo - The Last Judgement

"Divest not yourselves of the robe of courtesy and fairmindedness, and speak not that which hath been forbidden you in the Tablets of your Lord, the Help in Peril, the Self-Subsisting. Whoso is deprived of courtesy walketh naked among men, though he be clothed in all the world’s silk. This is that which hath been revealed through the power of truth in His mighty and guarded Tablets. He who is devoid of courtesy is indeed bereft of faith."

—Bahá’u’lláh

(Additional Tablets and Extracts from Tablets Revealed by Bahá’u’lláh)
www.bahai.org/r/613867124