From The Everlasting Man by G. K. Chesterton:
Now the best relation to our spiritual home is to be near enough to love it. But the next best is to be far enough away not to hate it. It is the contention of these pages that while the best judge of Christianity is a Christian, the next best judge would be something more like a Confucian. The worst judge of all is the man now most ready with his judgements; the ill-educated Christian turning gradually into the ill-tempered agnostic, entangled in the end of a feud of which he never understood the beginning, blighted with a sort of hereditary boredom with he knows not what, and already weary of hearing what he has never heard.
…I recommend these critics to try to do as much justice to Christian saints as if they were Pagan sages.
…I mean that just as the Church seems to grow more remarkable when it is fairly compared with the common religious life of mankind, so mankind itself seems to grow more remarkable when we compare it with the common life of nature. And I have noticed that most modern history is driven to something like sophistry, first to soften the sharp transition from animals to men, and then to soften the sharp transition from heathens to Christians.
…The first of these is the creature called man and the second is the man called Christ. I have therefore divided this book into two parts: the former being a sketch of the main adventure of the human race in so far as it remained heathen; and the second a summary of the real difference that was made by it becoming Christian.