How did the Fellow Craft respond to the question at the outer door?

The correct response from the Fellow Craft at the outer door is a Fellow Craft on his way to the middle chamber. This answer emphasizes the progression and journey that the Fellow Craft undertakes in the Masonic journey, specifically highlighting the importance of seeking further knowledge and understanding in the middle chamber.

In Masonic tradition, the middle chamber is representative of deeper learning and enlightenment, and the response indicates the Fellow Craft's intention to advance along this path of personal and moral development. By specifying that the Fellow Craft is on his way to the middle chamber, it signifies the commitment to growth and the responsibilities that come with furthering one's knowledge in the Craft.

Other options, while related to the pursuit of knowledge and wisdom, do not capture the specific context of advancement represented by "on his way to the middle chamber." This distinction is critical in understanding the role and mindset of the Fellow Craft within the Masonic teachings.