The famous British apologist for the Holy Prophet Muhammad, Thomas Carlyle wrote in his book, On Heroes, Hero-Worship, and The Heroic in History:
Much has been said of Mahomet’s propagating his Religion by the sword. It is no doubt far nobler what we have to boast of the Christian Religion, that it propagated itself peaceably in the way of preaching and conviction. Yet withal, if we take this for an argument of the truth or falsehood of a religion, there is a radical mistake in it. The sword indeed: but where will you get your sword! Every new opinion, at its starting, is precisely in a minority of one. In one man’s head alone, there it dwells as yet. One man alone of the whole world believes it; there is one man against all men. That he take a sword, and try to propagate with that, will do little for him. You must first get your sword! On the whole, a thing will propagate itself as it can.