Karl Barth, Evangelical Theology: An Introduction (Grand Rapids, MI: Eerdmans, 1963).
Quote from the Book: "Theological work can be done only in the indissoluble unity of prayer and study. Prayer without study would be empty. Study without prayer would be blind." (p. 171)
Bonus quote! "A lazy student, even as a theologian, is no student at all!" (ibid.)
This is one of the finest theological works that I have ever come across. For those interested in taking up a study of Karl Barth's theology, this is one of the best places to begin. Based on the lectures he delivered at Princeton Theological Seminary in the 1960s, and edited by himself and his son Marcus, this work is a series of succinct and mature reflections on the task of theology. As usual with Barth, these essays never give one a comfortable place to rest but tirelesly press on towards the ideal of dogmatic theology. Also, these essays never loose their freshness no matter how many times one takes them up. I highly recommend this volume to all regardless of how much theological background is possessed.
I) The Place of Theology
2. The Word
3. The Witnesses
4. The Community
5. The Spirit
II) Theological Existence
III) The Threat to Theology
IV) Theological Work
P.S. This book was featured in my installment of the Recommended Reading Meme. It has also received some attention over at Exiled Preacher.