21. What doctrine is held by the Roman Catholic church about the atonement of Christ for sin?
22. Of what did the temporary punishments for sin usually consist—that is, in early times?
23. What changes were made later?
24. Describe the traffic in indulgences.
25. What excuse was made by the pope for the vigorous sale of indulgences in the 16th century?
26. Who hawked indulgences in the part of Germany where Luther lived?
27. What was the character of Tetzel? (Note 5.)
28. In what spirit was Luther's controversy with Tetzel regarded at Rome?
29. What aroused the pope from his indifference?
30. In what way did meet the difficulty?