Thomas a Kempis 
The Imitation of Christ [EPUB ebook] 

He that followeth me shall not walk in darkness, saith the Lord. These are the words of Christ; and they teach us how far we must imitate His life and character, if we seek true illumination, and deliverance from all blindness of heart. Let it be our most earnest study, therefore, to dwell upon the life of Jesus Christ. His teaching surpasseth all teaching of holy men, and such as have His Spirit find therein the hidden manna. But there are many who, though they frequently hear the Gospel, yet feel but little longing after it, because they have not the mind of Christ. He, therefore, that will fully and with true wisdom understand the words of Christ, let him strive to conform his whole life to that mind of Christ.