But the message of Islam was not for Arabia only; the whole world was to share in it. [25] As there was but one God, so there was to be but one religion into which all men were to be invited. This claim to be universal, to hold sway over all men and all nations, found a practical illustration in the letters which Muḥammad is said to have sent in the year A.D. 688 (A.H. 6) to the great potentates of that time. An invitation to embrace Islam was sent in this year to the Emperor Heraclius, the king of Persia, the governor of Yaman, the governor of Egypt and the king of Abyssinia. The letter to Heraclius is said to have been as follows:—“In the name of God, the Merciful, the Compassionate, Muḥammad, who is the servant of God and His apostle, to Hiraql the Qayṣar of Rūm. Peace be on whoever has gone on the straight road. After this I say, Verily I call you to Islam. Embrace Islam, and God will reward you twofold. If you turn away from the offer of Islam, then on you be the sins of your people. O people of the Book, come towards a creed which is fit both for us and for you. It is this—to worship none but God, and not to associate anything with God, and not to call others God. Therefore, O ye people of the Book, if ye refuse, beware. We are Muslims and our religion is Islam.” However absurd this summons may have seemed to those who then received it, succeeding years showed that it was dictated by no empty enthusiasm. [26] These letters only gave a more open and widespread expression to the claim to the universal acceptance which is repeatedly made for Islam in the Qurʼān. “Of a truth it (i.e. the Qurʼān) is no other than an admonition to all created beings, and after a time shall ye surely know its message. (xxxviii. 87–88.) “This (book) is no other than an admonition and a clear Qurʼān, to warn whoever liveth; and that against the unbelievers sentence may be justly given. (xxxvi. 69–70.) “We have not sent thee save as a mercy to all created beings. (xxi. 107.) “Blessed is He who hath sent down al-Furqān upon His servant, that he may be a warner unto all created beings. (xxv. 1.) “And We have not sent thee otherwise than to mankind at large, to announce and to warn. (xxxiv. 27.) “He it is who hath sent His apostle with guidance and the religion of truth, that He may make it victorious over every other religion, though the polytheists are averse to it.” (lxi. 9.) In the hour of his deepest despair, when the people of Mecca persistently turned a deaf ear to the words of their prophet (xvi. 23, 114, etc.), when the converts he had made were tortured until they recanted (xvi. 108), and others were forced to flee from the country to escape the rage of their persecutors (xvi. 43, 111)—then was delivered the promise, “One day we will raise up a witness out of every nation.” (xvi. 86.) [27]