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The Book of Galatians
An introduction to Galatians in an outline form that is easy to read. A good place to begin research.
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Sukkot
Discusses the sukkah and its symbolism. Also describes the purpose of the lulav and etrog. Links at bottom of page to the blessings.
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West Ark Church of Christ: A Study of Galatians
An outlined overview of Galatians that focuses on the main points of the book. It provides a good introduction, then you can click on the specific chapters to read a more detailed commentary on the book.