The importance of the Arabic Language in the Baha'i Faith

"Although there can be no question or doubt as to the sweetness of the Persian tongue, yet it hath not the scope of the Arabic. There are many things which have not been expressed in Persian, that is to say, words referring to such things have not been devised, whilst in Arabic there are several words describing the same thing. Indeed there existeth no language in the world as vast and comprehensive as Arabic."

The Tabernacle of Unity - Baha'u'llah page 53.