The Tablets of Bahá’u’lláh are many. The precepts and teachings they contain are universal, covering every subject. He has revealed scientific explanations ranging throughout all the realms of human inquiry and investigation—astronomy, biology, medical science, etc. In the Kitáb-i-Íqán He has given expositions of the meanings of the Gospel and other heavenly Books. He wrote lengthy Tablets upon civilization, sociology and government. Every subject is considered. His Tablets are matchless in beauty and profundity. Even His enemies acknowledge the greatness of Bahá’u’lláh, saying He was the miracle of humanity. This was their confession although they did not believe in Him. He was eulogized by Christians, Jews, Zoroastrians and Muslims who denied His claim. They frequently said, “He is matchless, unique.” A Christian poet in the Orient wrote, “Do not believe him a manifestation of God, yet his miracles are as great as the sun.” Mírzá Abu’l-Fadl has mentioned many poems of this kind, and there are numerous others. The testimony of His enemies witnessed that He was the “miracle of mankind,” that He “walked in a special pathway of knowledge” and was “peerless in personality.” His teachings are universal and the standard for human action. They are not merely theoretical and intended to remain in books. They are the principles of action. Results follow action. Mere theory is fruitless. Of what use is a book upon medicine if it is never taken from the library shelf? When practical activity has been manifested, the teachings of God have borne fruit. The great and fundamental teachings of Bahá’u’lláh are the oneness of God and unity of mankind. This is the bond of union among Bahá’ís all over the world. They become united among themselves, then unite others. It is impossible to unite unless united. Christ said, “Ye are the salt of the earth; but if the salt has lost his savour, wherewith shall it be salted?” This proves there were dissensions and lack of unity among His followers. Hence His admonition to unity of action. Now must we, likewise, bind ourselves together in the utmost unity, be kind and loving to each other, sacrificing all our possessions, our honor, yea, even our lives for each other. Then will it be proved that we have acted according to the teachings of God, that we have been real believers in the oneness of God and unity of mankind. 30 May 1912 Talk at Theosophical Lodge Broadway and Seventy-ninth Street, New York Notes by Howard MacNutt