Luther's transformational idea of justification by faith alone was often misunderstood and misrepresented in the early years of the Reformation. In 1520, with his Wittenberg congregation in mind, Luther set out to clarify the biblical foundation of good works. In doing so he recast the very definitions of "sacred" and "secular" both for his own generation and ours. Treatise on Good Works is the second of an occasional series of guides to key Reformation treatises by Martin Luther. Aimed at increasing understanding and interest among contemporary readers, these slim, affordable volumes feature new translations and a range of helpful features.