This is the birth month of our beloved Prophet Muhammad, may the peace and blessings of Allah be upon him, and below are some inspiring quotes by non-Muslims about the final messenger of God:
(Source: http://www.whyislam.org/muhammad/what-they-say-about-prophet-muhammadpbuh/)
1. “If greatness of purpose, smallness of means, and astounding results are the three criteria of human genius, who could dare to compare any great man in modern history with Muhammad? The most famous men created arms, laws and empires only. They founded, if anything at all, no more than material powers which often crumbled away before their eyes. This man moved not only armies, legislations, empires, peoples and dynasties, but millions of men in one-third of the then inhabited world; and more than that, he moved the altars, the gods, the religions, the ideas, the beliefs and souls… His forbearance in victory, his ambition, which was entirely devoted to one idea and in no manner striving for an empire; his endless prayers, his mystic conversations with God, his death and his triumph after death; all these attest not to an impostor but to a firm conviction which gave him the power to restore a dogma. This dogma was twofold, the unity of God and the immateriality of God; the former telling what God is, the latter telling what God is not; the one overthrowing false gods with the sword, the other starting an idea with the words.
Philosopher, orator, apostle, legislator, warrior, conqueror of ideas, restorer of rational dogmas, of a cult without images; the founder of twenty terrestrial empires and of one spiritual empire, that is Muhammad. As regards all standards by which human greatness may be measured, we may well ask, is there any man greater than he?” [Lamartine, Histoire de la Turquie, Paris 1854 Vol. II, pp. 276-77.]
2. “He was Caesar and Pope in one; but he was Pope without Pope’s pretensions, Caesar without the legions of Caesar: without a standing army, without a bodyguard, without a palace, without a fixed revenue; if ever any man had the right to say that he ruled by the right divine, it was Mohammad, for he had all the power without its instruments and without its supports.” [Bosworth Smifu, Mohammad and Mohammadanism. London 1874, p. 92.]
3. “His readiness to undergo persecutions for his beliefs, the high moral character of the men who believed in him and looked up to him as leader, and the greatness of his ultimate achievement all argue his fundamental integrity. To suppose Muhammad an impostor raises more problems than it solves. Moreover, none of the great figures of history is so poorly appreciated in the West as Muhammad.” [W. Montgomery, Mohammad at Mecca, Oxford, 1953, p. 52.]
4. “Muhammad, the inspired man who founded Islam, was born about A.D. 570 into an Arabian tribe that worshipped idols. Orphaned at birth, he was always particularly solicitous of the poor and needy, the widow and the orphan, the slave and the downtrodden. At twenty he was already a successful businessman, and soon became director of camel caravans for a wealthy widow. When he reached twenty-five his employer, recognizing his merit, proposed marriage. Even though she was fifteen years older, he married her, and as long as she lived remained a devoted husband.
Like almost every major prophet before him, Muhammad fought shy of serving as the transmitter of God’s word, sensing his own inadequacy. But the angel commanded ‘Read’. So far as we know, Muhammad was unable to read or write, but he began to dictate those inspired words which would soon revolutionize a large segment of the earth; “There is one God”.
In all things Muhammad was profoundly practical. When his beloved son Ibrahim died, an eclipse occurred, and rumors of God’s personal condolence quickly arose. Whereupon Muhammad is said to have announced, ‘An eclipse is a phenomenon of nature. It is foolish to attribute such things to the death or birth of a human being’.
At Muhammad’s own death an attempt was made to deify him, but the man who was to become his administrative successor killed the hysteria with one of the noblest speeches in religious history: ‘If there are any among you who worshipped Muhammad, he is dead. But if it is God you worshipped, He lives forever’.” [James A. Michener, ‘Islam The Misunderstood Religion’, In the Reader’s Digest (American Edition) for May 1955, pp. 68-70.]