Muhammad professed to derive ...

Muhammad professed to derive from Heaven, and he has inserted in the Koran, not only a body of religious doctrines, but political maxims, civil and criminal laws, and theories of science. The gospel, on the contrary, only speaks of the general relations of men to God and to each other - beyond which it inculcates and imposes no point of faith. This alone, besides a thousand other reasons, would suffice to prove that the former of these religions will never long predominate in a cultivated and democratic age, whilst the latter is destined to retain its sway at these as at all other periods.
Muhammad professed to derive from Heaven, and he has inserted in the Koran, not only a body of religious doctrines, but political maxims, civil and criminal laws, and theories of science. The gospel, on the contrary, only speaks of the general relations of men to God and to each other - beyond which it inculcates and imposes no point of faith. This alone, besides a thousand other reasons, would suffice to prove that the former of these religions will never long predominate in a cultivated and democratic age, whilst the latter is destined to retain its sway at these as at all other periods.

Quotes from the same author

Americans of all ages, all stations of life, and all types of disposition are forever forming associations. In democratic countries knowledge of how to combine is the mother of all other forms of knowledge; on its progress depends that of all the others.
In the United States, if a political character attacks a sect, this may not prevent even the partisans of that very sect, from supporting him; but if he attacks all the sects together, every one abandons him and he remains alone.
The territorial aristocracy of former ages was either bound by law, or thought itself bound by usage, to come to the relief of its serving-men and to relieve their distresses. But the manufacturing aristocracy of our age first impoverishes and debases the men who serve it and then abandons them to be supported by the charity of the public.
The last thing abandoned by a party is its phraseology, because among political parties, as elsewhere, the vulgar make the language, and the vulgar abandon more easily the ideas that have been instilled into it than the words that it has learnt.
Men cannot abandon their religious faith without a kind of aberration of intellect and a sort of violent distortion of their true nature; they are invincibly brought back to more pious sentiments. Unbelief is an accident, and faith is the only permanent state of mankind.