The great Christian doctrines are worth thinking through for ourselves. That's why Gordon Lewis has provided this concise and complete survey of the major truths of the Christian faith. But rather than just telling us what he has discovered in Scripture, he offers a theological workbook that helps us explore the evidence itself and to draw our own conclusions. He has organized the material around the main themes of God, Christ, the Holy Spirit, humanity, creation, the church, and the end times. This unique text has been used by students of the Bible over the last three decades in the classroom, in the home and in the church. Its enduring quality continues to make it a valuable tool for all who want to develop a systematic theology for themselves. Of Lewis's six published books, his Decide for Yourself: A Theological Workbook has been the most versatile.

The study and research tools in Logos Bible Software are sometimes only as good as the library that comes with them. The larger your library, the more effective you can be in your study of the Bible. Whether you are working with the Factbook, Passage Guide or the Exegetical Guide, the resources in your library, commentaries, grammars, dictionaries, and reference works, are the fuel that drive all the best features in Logos Bible Software. With over fifteen hundred reference works, Master Feature Collection gives you everything you need to make the most of your sermon writing, bible study, exegesis, and research.

The Theology Guide collects and displays key information related to all the major topics in systematic theology, including a brief introduction to each topic, and links directly to every systematic theology in Logos. Get the Theology Guide Feature Expansion, L for your library to give this powerful tool even more resources to search. To get started in researching any of the major topics in systematic theology, run the Theology Guide and use it to gather information about a theological topic from your library. This collection includes everything in the Theology Guide Feature Expansion, M as well more than twenty additional resources to help expand your studies.

Our largest package, the 2025 Ultimate Library, provides an incredible library for biblical research and theological reflection. Whether focused on Church history or biblical exegesis, the vast collection of resources and titles at your fingertips cover the gamut—from most devotionals to practical discussions of pastoral ministry to the most rigorous scholarly and academic research. This package has everything you need to engage in the serious study of Scripture and its world, with respected resources like the Library of Hebrew Bible/Old Testament Studies | LHBOTS (382 vols.) and top-tier exegetical commentaries like the New International Commentary on the Old and New Testament | NIC (51 vols.).

The Theology Guide collects and displays key information related to all the major topics in systematic theology, including a brief introduction to each topic, and links directly to every systematic theology in Logos. Get the Theology Guide Feature Expansion, S for your library to give this powerful tool even more resources to search. To get started in researching any of the major topics in systematic theology, run the Theology Guide and use it to gather information about a theological topic from your library.

The Theology Guide collects and displays key information related to all the major topics in systematic theology, including a brief introduction to each topic, and links directly to every systematic theology in Logos. Get the Theology Guide Feature Expansion, M for your library to give this powerful tool even more resources to search. To get started in researching any of the major topics in systematic theology, run the Theology Guide and use it to gather information about a theological topic from your library. This collection includes everything in the Theology Guide Feature Expansion, S as well more than fifteen additional resources to help expand your studies.