4:1 walk. Throughout the second half of this letter, Paul unfolds the “walk,” or life of good works, first mentioned in 2:10. This figure of speech for moral conduct is common in Scripture.

calling. Paul earlier spoke of a hope to which believers are called (1:18; 4:4); now he focuses on the life to which they are called. He has already provided strong indications of its shape and significance (1:4; 2:10).