5. "And unless made with intent of heart, mistakes in this matter shall be no crimes in you."--Sura XXXIII. The teachings of the Koran make our natural inclination subject to regulation. It lays stress upon the heart of men. Note the following injunctions regarding internal purity: 120. "Abandon the outside iniquity and its inside."--Sura VI. 152. "Come not near the pollutions outside or inward."--_Ibid._ 31. "Say: Truly my Lord hath forbidden filthy actions whether open or secret, and iniquity and unjust violence."--Sura VIII. Referring to Dr. Mosheim's cause of the spread of Islam, I will quote Henry Hallam's opinion regarding the causes of the success of Islam. Henry Hallam, after enumerating the three important causes of the success of Islam, the first of which is "those just and elevated notions of the divine nature and of moral duties, the gold-ore that pervades the dross of the Koran, which were calculated to strike a serious and reflecting people," and explaining the two others which are not against us, he says:-- "It may be expected that I should add to this what is commonly considered as a distinguishing mark of Mohammedanism,--its indulgence to voluptuousness. But this appears to be greatly exaggerated. Although the character of its founder may have been tainted by sensuality as ferociousness, I do not think that he relied upon inducements of the former kind for the diffusion of his system. We are not to judge of this by rules of Christian purity, or of European practice. If polygamy was a prevailing usage in Arabia, as is not questioned, its permission gave no additional license to the proselytes of Mohammed, who will be found rather to have narrowed the unbounded liberty of oriental manners in this respect; while his decided condemnation of adultery and of incestuous connections, so frequent among barbarous nations, does not argue a very lax and accommodating morality. A devout Mussulman exhibits much more of the stoical than the epicurean character. Nor can any one read the Koran without being sensible that it breathes an austere and scrupulous spirit. And in fact, the founder of a new religion or sect is little likely to obtain permanent success by indulging the vices or luxuries of mankind. I should rather be disposed to reckon the severity of Mohammed's discipline among the causes of its influence. Precepts of ritual observance, being always definite and unequivocal, are less likely to be neglected, after their obligation has been acknowledged than those of moral virtue. Thus the long fasting, the pilgrimages, and regular prayers and ablutions, the constant almsgiving, the abstinence from stimulating liquors, enjoined by the Koran, created a visible standard of practice among its followers, and preserved a continual recollection of their law.