The early Christian missionaries demanded an absolutely exclusive devotion to Christ. Such exclusiveness ran directly counter to the prevailing syncretism of the Hellenistic age. Salvation, in other words, was not merely through Christ, but it was only through Christ. Without its exclusiveness, the Christian message would have seemed perfectly inoffensive to the men of that day. So modern liberalism, placing Jesus alongside other benefactors of mankind, is perfectly inoffensive in the modern world.
All men speak well of it.
It is entirely inoffensive. But it is also entirely futile. The offence of the Cross is done away, but so is the glory and the power. Machen, Christianity and Liberalism , pp.