[3] The author of the book containing this chapter is anonymous, but early Christian tradition uniformly affirmed that John composed this Gospel.

However, there are also references to a Jewish ruling that anyone who believed Jesus to be the Messiah would be excluded from the synagogue (John 9:22).

[15] The decision has been linked to the possible Council of Jamnia which was once thought to have decided the content of the Jewish canon sometime in the late 1st century (c. 70–90 AD).

[16] Verse 34 confirms that "they cast him out",[17] the Amplified Bible and the New Living Translation adding text to refer to his exclusion from the synagogue.

[18] Pope Paul VI describes the faith evidenced in this verse as "firm and resolute, ... though always humble and diffident".