“.... A mass of detail in the early sources show that he was an honest and
upright man who had gained the respect and loyalty of others
who were like-wise honest and upright men.”
(ENCYCLOPAEDIA BRITANNICA Vol. 12)
Born in Arabia in the year 570, started his mission of preaching the religion of Truth, Islam (submission to One God) at the age of forty and departed from this world at the age of sixty-three.
During this short period of 23 years of his Prophet hood, he changed the complete Arabian peninsula
From paganism and idolatry to SUBMISSION to The God,
From tribal quarrels and wars to national solidarity and cohesion,
From drunkenness and debauchery to sobriety and piety,
From lawlessness and anarchy to disciplined living,
From utter bankruptcy to the highest standards of moral excellence.
MICHAEL H. HART Says:
“My choice of Muhammad to lead the list of the world's most influential persons may surprise some readers and may be questioned by others, but he was the only man in history who was supremely successful on both the religious and secular levels.”
(M.H. Hart, The 100: A Ranking Of The Most Influential Persons In History, New York, 1978, P. 33)
“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.”
(Alphonse de Lamar tine, HISTOIRE DE LA TURQUIE, Paris, 1854, Vol. II, pp 276-277)
GEORGE BERNARD SHAW Says:
I have always held the religion of Muhammad in high estimation because of its wonderful vitality. It is the only religion, which appears to me to possess that assimilating capacity to the changing phase of existence, which can make itself appeal to every age.
I have studied him - the wonderful man and in my opinion for from being an anti-Christ, he must be called the Savior of Humanity."
I have prophesied about the faith of Muhammad that it would be acceptable to the Europe of tomorrow as
it is beginning to be acceptable to the Europe of today.
He established a powerful and dynamic society to practice and represent his teachings and completely revolutionized the worlds of human thought and behavior for all times to come.('The Genuine Islam,' Vol. 1, No. 8, 1936.)
DIWAN CHAND SHARMA Says:
“Muhammad was the soul of kindness, and his influence was felt and neverforgotten by those around him.”
(D.C. Sharma, THE PROPHETS OF THE EAST,Calcutta, 1935, pp. 12)
SAROJINI NAIDU says:
“It was the first religion that preached and practiced democracy; for, in the mosque, when the call for prayer is sounded and worshippers are gathered together, the democracy of Islam is embodied five times a day when the peasant and king kneel side by side and proclaim: ‘God Alone is Great’...”
(IDEALS OF ISLAM, vide Speeches & Writings, Madras, 1918, p. 169)
PROF. HURGRONJE Says:
“The league of nations founded by the prophet of Islam put the principle of international unity and human brotherhood on such universal foundations as to show candle to other nations.”
“The fact is that no nation of the world can show a parallel to what Islam has done towards the realization of the idea of the League of Nations.”
MAHATMA GANDHI Says:
“I wanted to know the best of one who holds today's undisputed sway over the hearts of millions of mankind...”
I became more than convinced that it was not the sword that won a place for Islam in those days in the scheme of life.
(Published in 'Young India,'1924)
DR. GUSTAV WEIL Says:
Muhammad was a shining example to his people. His character was pure and stainless. His house, his dress, his food - they were characterized by a rare simplicity. So unpretentious was he that he would receive from his companions no special mark of reverence, nor would he accept any service from his slave which he could do for himself. He was accessible to all and at all times. He visited the sick and was full of sympathy for all. Unlimited was his benevolence and generosity as also was his anxious care for the welfare of the community. ('History of the Islamic Peoples' )
DR. WILLIAM DRAPER Says:
Four years after the death of Justinian, A.D. 569, was born in Mecca, in Arabia, the man who, of all men, has exercised the greatest influence upon the human race... To be the religious head of many empires, to guide the daily life of one-third of the human race, may perhaps justify the title of a Messenger of God. (’History of Intellectual Development of Europe’)
K. S. RAMAKRISHNA RAO Says:
The theory of Islam and sword, for instance, is not heard now in any quarter worth the name. The principle of Islam that “there is no compulsion in religion” is well known. (‘Mohammed: The Prophet of Islam,’ 1989 )
Source : http://www.thinkislam.co.in/pamplets/muhammed.html