The Great Being saith: Human utterance is an essence which aspireth to exert its influence and needeth moderation. As to its influence, this is conditional upon refinement which in turn is dependent upon hearts which are detached and pure. As to its moderation, this hath to be combined with tact and wisdom as prescribed in the Holy Scriptures and Tablets.
Bahá'u'lláhBe generous in prosperity and thankful in adversity, Be fair in thy judgment, and guarded in thy speech. Be a lamp unto those who walk in darkness, and a home to the stranger. Be eyes to the blind, and a guiding light unto the feet of the erring. Be a breath of life to the body of humankind, a dew to the soil of the human heart, and a fruit upon the tree of humility.
Bahá'u'lláhA 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...
Bahá'u'lláh