Final answer:
The phrase "The just shall live by faith" in the book of Romans contributed to the development of the doctrine of justification by faith alone during the Protestant Reformation. Martin Luther interpreted this verse to mean that salvation comes through faith in God's grace, rather than through good works. This theological difference between Protestantism and Catholicism remains significant today.
Step-by-step explanation:
The question is referencing the phrase "The just shall live by faith" found in the book of Romans in the Bible. This phrase was significant during the Protestant Reformation and contributed to the development of the doctrine of justification by faith alone. Martin Luther, a key figure in the Reformation, interpreted this verse to mean that salvation comes through faith in God's grace, rather than through good works.
Luther's understanding challenged the Catholic Church's belief that good works were necessary for salvation. This theological difference played a major role in the split between Protestantism and Catholicism. The idea of justification by faith alone remains a central tenet of many Protestant denominations today.