The Heidelberg Disputation was held at the lecture hall of the Augustinian order on April 26, 1518. It was here that Martin Luther, as a delegate for his order, began to have occasion to articulate his views. In the defense of his theses, which culminated in a contrast between divine love and human love, Luther defended the doctrine of human depravity and the bondage of the will. Martin Bucer, the reformer of Strasbourg, heard Luther here and became an avid follower. This disputation also led to Johann Eck's challenging Martin Luther to the Leipzig Debate.
The Heidelberg 28 theses based the disputation, and represented a significant evolution from the 95 theses of the previous year from a simple dispute about the theology behind the indulgences to a fuller, Augustinian, theology of sovereign grace.
- Kittelson 1986, p. 111.
- Totten 2003, p. 446.
- Kittelson 1986, p. 112: "Martin Bucer, who later took up what he understood to be Luther's cause, observed in a letter to his friends, 'Luther responds with magnificent grace and listens with insurmountable patience. He presents an argument with the insight of the apostle Paul.'"
- Kolb 2009, p. 24.
- Luther 2008.
- Kittelson, James (1986), Luther the Reformer, Minneapolis: Augsburg Publishing House, ISBN 978-0-80662240-8, retrieved 2012-11-18.
- Kolb, Robert (2009), Martin Luther, New York: Oxford University Press, ISBN 978-0-19920894-4, retrieved 2012-11-18.
- Luther, Martin (Sep 2008) [26 Apr 1518], "The Heidelberg Disputation", The book of concord, retrieved 24 Sep 2017.
- Totten, Mark (2003), "Luther on unio cum Christo: Toward a Model for Integrating Faith and Ethics", The Journal of Religious Ethics, Wiley-Blackwell, 31 (3): 443–62, doi:10.1111/1467-9795.00147, ISSN 0384-9694, JSTOR 40008337.