Consort with all men, O people of Baha, in a spirit of
friendliness and fellowship. If ye be aware of a certain truth, if ye possess a
jewel, of which others are deprived, share it with them in a language of utmost
kindliness and goodwill. If it be accepted, if it fulfill its purpose, your
object is attained. If anyone should refuse it, leave him unto himself, and
beseech God to guide him. Beware lest ye deal unkindly with him. A kindly
tongue is the lodestone of the hearts of men. It is the bread of the spirit, it
clotheth the words with meaning, it is the fountain of the light of wisdom and
understanding.
(Baha'u'llah, ‘Epistle to the Son of the Wolf’)