French writer, historian and politician, Alphonse de Lamartine:

“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?”

Irish playwright, critic, polemicist and political activist, Sir George Bernard Shaw:

“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.”

American scientist, philosopher, physician, chemist, historian and photographer, Dr. William Draper:

“Four years after the death of Justinian, A.D. 569, was born in Mecca, in Arabia, the man Muhammad, 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.”

British archaeologist and scholar, David George Hogarth:

Muhammad’s daily behavior has instituted a canon which millions observe this day with conscious memory. No one regarded by any section of the human race as Perfect Man has ever been imitated so minutely. The conduct of the founder of Christianity has not governed the ordinary life of his followers. Moreover, no founder of a religion has left on so solitary an eminence as the Muslim apostle.

Author of 'The 100, A Ranking of the Most Influential Persons In History,' New York, 1978, Michael Hart:

"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 secular and religious level. It is probable that the relative influence of Muhammad on Islam has been larger than the combined influence of Jesus Christ and St. Paul on Christianity. It is this unparalleled combination of secular and religious influence which I feel entitles Muhammad to be considered the most influential single figure in human history".

Professor Emeritus, University of Toronto’s Department of Anatomy and Cell Biology, Dr. Keith L. Moore:

"It has been a great pleasure for me to clarify statements in the Qur'an about human development. It is clear to me that these statements must have come to Muhammad from God, because most of this knowledge was not discovered until many centuries later. This proves to me that Muhammad must have been a messenger of God."