Mahomet and Islam.--Carlyle portrays vividly the wondrous transition from weakness to strength that came over the descendants of Ishmael, when they became a believing nation, abandoning idolatry, and accepting Allah as their god, with Mahomet as his prophet: "To the Arab nation it was as a birth from darkness into light; Arabia first became alive by means of it. A poor shepherd people roaming unnoticed in its deserts since the creation of the world; a hero-prophet was sent down to them with a word they could believe; see, the unnoticed becomes world-notable, the small has become world-great; within one century afterwards Arabia is at Granada on this hand, at Delhi on that--glancing in valor and splendor and the light of genius, Arabia shines through long ages over a great section of the world. Belief is great, life-giving. The history of a nation becomes fruitful, soul-elevating, great, so soon as it believes. These Arabs, the man Mahomet, and that one century--is it not as if a spark had fallen, one spark, on a world of what seemed black, unnoticeable sand; but lo, the sand proves explosive powder, blazes heaven-high from Delhi to Granada! I said, the great man was always as lightning out of heaven; the rest of men waited for him like fuel, and then they too would flame."--("Heroes and Hero Worship," Lecture II.) Achievements of Christendom.--Who can doubt that this same philosophy applies to Christendom and its marvelous achievements, all down the centuries? Is it not faith in the divine Nazarene that has caused Christian nations to thrive, that has enabled Christianity, in spite of its errors, to flourish, to survive the wreck of empires and weather the storms of time? Was not Christ indeed as "lightning out of heaven," sent down to kindle and illumine the world, and has not the world been warmer and brighter for his coming? Is it not the faith of any nation, its trust in and reliance upon some power deemed by it divine, that constitutes its main strength? Faith Must Be Genuine.--But faith must be genuine. Pretense and formalism will not avail. Hypocrisy is the worst form of unbelief. Honest idolatry is infinitely preferable to dishonest worship. Better burn incense to Diana, believing it to be right, than bow down to Christ in hollow-hearted insincerity. Mighty Rome did not fall, until she had ceased to worship sincerely the gods enshrined within her Pantheon. Glorious Greece did not succumb, until she had proved false to her ancient faith, until her believers had become doubters, until skeptical philosophy had supplanted religious enthusiasm, and the worship of freedom, grace, and beauty had degenerated to unbridled license and groveling sensuality. No nation ever crumbled to ruin until false to itself, false to the true principles of success, the basic one of which is to believe.