Many years ago, I began reading the reformers from the 16th century. Since then, I have never looked back, and rarely read a devotional. They just lack the kind of meat that a Christian needs to grow in the faith. C.S. Lewis noted this too:
“For my own part I tend to find the doctrinal books often more helpful in devotion that the devotional books, and I rather suspect that the same experience may await many others. I believe that many who find that ‘nothing happens’ when they sit down, or kneel down, to a book of devotion, would find that the heart sings unbidden while they are working their way through a tough bit of theology with a pipe in their teeth and a pencil in their hand” (taken from C.S. Lewis’ introduction to Athanasius’ On the Incarnation).
This is not a unique experience. I wish that the vast numbers of modern evangelicals would put down their copy of The Purpose-Driven Life, or Your Best Life Now, or The Prayer of Jabez, and pick up Luther, Chemnitz, or even Calvin. Or, if these cause to much trepidation, even to read C.S. Lewis. Instead they run from one fad reading to another, and never receive the meat of the Word. The modern evangelical church is a starving group of sheep.