And the prince of virtues is...

O people of God! I admonish you to observe courtesy, for above all else it is the prince of virtues. Well is it with him who is illumined with the light of courtesy and is attired with the vesture of uprightness. Whoso is endued with courtesy hath indeed attained a sublime station.

Baha'u'llah, Tablets of Baha'u'llah, p. 88