Boundaries: When to Say YES; When to Say NO to Take Control of Your Life is a Christian self-help book by Dr. Henry Cloud and Dr. John Townsend. The authors argue that boundaries, what we accept and reject, are a necessary component to defining ourselves spiritually and emotionally and allow us to make meaningful decisions in our lives. Citing the bible extensively, the book discusses problems resulting from either a lack of clear moral boundaries or from having too rigidly-defined boundaries.
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