Islam was something like a Christian heresy. The early heresies had been full of mad reversals and evasions of the Incarnation, rescuing their Jesus from the reality of his body even at the expense of the sincerity of his soul.
...but this is the real objection to that torrent of modern talk about treating crime as disease, about making prison merely a hygienic environment like a hospital, of healing sin by slow scientific methods. The fallacy of the whole thing is that evil is a matter of active choice whereas disease is not.
All the controversialists who have become conscious of the real issue are already saying of our ideal exactly what used to be said of the Socialists' ideal. They are saying that private property is too ideal not to be impossible. They are saying that private enterprise is too good to be true. They are saying that the idea of ordinary men owning ordinary possessions is against the laws of political economy and requires an alteration in human nature.
To do Mohammed justice, his main attack was against the idolatries of Asia. Only he thought, just as the Arians did and just as the Unitarians do, that he could attack them better with a greater approximation to plain theism. What distinguishes his heresy from anything like an Arian or Albigensian heresy is that, as it sprang up on the borders of Christendom, it could spread outwards to a barbaric world.
People have fallen into a foolish habit of speaking of orthodoxy as something heavy, humdrum, and safe. There never was anything so perilous or so exciting as orthodoxy. It was sanity: and to be sane is more dramatic than to be mad.
It is the beginning of all true criticism of our time to realize that it has really nothing to say, at the very moment when it has invented so tremendous a trumpet for saying it.
It is quite an old-fashioned fallacy to suppose that our objection to scepticism is that it removes the discipline from life. Our objection to scepticism is that it removes the motive power. Materialism is not a thing which destroys mere restraint. Materialism itself is the great restraint.