G K Chesterton 
Orthodoxy [EPUB ebook] 

Gilbert Keith Chesterton (1874-1936) has been called 'the ablest and most exuberant proponent of orthodox Christianity of his time.’ In this captivating classic, Chesterton offers a unique explanation of the essentials of the Christian faith, and of his own journey from scepticism to belief. Since its first publication in 1908, Orthodoxy has been a powerful factor in the conversion and spirituality of many leading Christian thinkers, including C S Lewis and Philip Yancey.
'It is constantly assumed, especially in our Tolstoian tendencies, that when the lion lies down with the lamb the lion becomes lamb-like… That is simply the lamb absorbing the lion instead of the lion eating the lamb. The real problem is – can the lion lie down with the lamb and still retain his royal ferocity? That is the problem the Church attempted; that is the miracle she achieved.’ – from Orthodoxy.