Martin Luther´s On Christian Liberty is considered to be Luther´s seminal work on the doctrine of salvation by grace through faith alone, and not through works. This short manifesto expounds on the nature of the freedom of a Christian, providing some of the principles that would become the foundation of the Protestant Reformation. It includes the concepts of ´´man´s twofold nature´´ (the inner spiritual nature or the soul and the outer bodily nature of the flesh) and the importance of each... Mehr