#^1 JOHN 5, Free Bible Commentary
This is the only use of the NOUN form of the term "faith" (pistis) in all the writings of John! Possibly John was worried about an overemphasis on "correct theology" (as a system of beliefs) versus daily Christlikeness.
This is a very modern, Protestant concern, not an apostolic one. Jesus and his Twelve saw no conflict between the content of faith and its exercise.