Shortly after His imprisonment He addressed Epistles, or Tablets, to all the kings and rulers of the world, summoning them to universal peace, to unity and international brotherhood. Among these sovereigns was the Sháh of Persia, through whose instrumentality chiefly He had been imprisoned. In His letter to that ruler He arraigned him severely and prophesied his downfall, saying, “Thou art a tyrant; thy country will be laid waste; and thy family, humiliated and debased.” He wrote to the Sulṭán of Turkey in similar terms, saying, “Thy dominion will pass away from thee.” The Epistles to the kings and rulers summoning them to international peace were written by Bahá’u’lláh fifty years ago. Everything He wrote has come to pass. These letters were published in Bombay thirty years ago and are now spread broadcast throughout the world. Briefly, Bahá’u’lláh endured forty years of vicissitudes, ordeals and hardships for the purpose of spreading His teachings, which may be mentioned as follows:

The first teaching is that man should investigate reality, for reality is contrary to dogmatic interpretations and imitations of ancestral forms of belief to which all nations and peoples adhere so tenaciously. These blind imitations are contrary to the fundamental basis of the divine religions, for the divine religions in their central and essential teaching are based upon unity, love and peace, whereas these variations and imitations have ever been productive of warfare, sedition and strife. Therefore, all souls should consider it incumbent upon them to investigate reality. Reality is one; and when found, it will unify all mankind. Reality is the love of God. Reality is the knowledge of God. Reality is justice. Reality is the oneness or solidarity of mankind. Reality is international peace. Reality is the knowledge of verities. Reality unifies humanity.

In brief, His theme was that reality underlies all the great religious systems of the world. He summoned the nations and peoples of the world to it. Hostile nations because of their acceptance of the reality of His words became unified. Strife, discord and contention among them passed away; they attained a station of utmost love. At present in Asia those who have accepted His teachings and followed His example, although formerly most hostile and bitter