“The early Christian was very precisely a person carrying about a key . . . . The whole Christian movement consisted in claiming to possess that key. It was not merely a vague forward movement, which might be better represented by a battering ram. It was not something that swept along with it similar or dissimilar things, as does a modern social movement. As we shall see in a moment, it rather definitely refused to do so. It definitely asserted that there was a key, and that it possessed that key, and that no other key was like it; in that sense it was as narrow as you please. Only it happened to be the key that could unlock the prison of the whole world, and let in the white daylight of liberty.”
G. K. Chesterton, The Everlasting Man (Radford, 2008), page 137.