The other day I randomly stumbled upon this book The Imitation of Christ by Thomas A Kempis. After reading only the first page of it I felt like God gave me peace, rebuked me, sanctified me, and humiliated me all in the same moment. Since reading the first page, my wife and I have been going through it for our family devotional and it has been a huge blessing in my our lives. Here is an excerpt from the first chapter:
What good does it do to speak learnedly about the Trinity if, lacking humility, you displease the Trinity? Indeed it is not learning that makes a man holy and just, but a virtuous life makes him pleasing to God. I would rather feel contrition than know how to define it. For what would it profit us to know the whole Bible by heart and the principles of all the philosophers if we live without grace and the love of God? Vanity of vanities and all is vanity, except to love God and serve Him alone.
This is the greatest wisdom — to seek the kingdom of heaven through contempt of the world. It is vanity, therefore, to seek and trust in riches that perish. It is vanity also to court honor and to be puffed up with pride. It is vanity to follow the lusts of the body and to desire things for which severe punishment later must come. It is vanity to wish for long life and to care little about a well-spent life. It is vanity to be concerned with the present only and not to make provision for things to come. It is vanity to love what passes quickly and not to look ahead where eternal joy abides.
You can find it here for free. If you want to buy it, I like this version of it the best because of its aesthetic quality . It just has that old book feel with these classic prints in it. If you have any other good devotional books you should share them.