medieval-religion: Scholarly discussions of medieval religion and culture

I am wondering if anyone could help me to find the sources of the following (I am sending 11 inquiries separately). They are in a late 14th century devotional discourse.

6] St John Chrysostom (of the gold mouth): there is nothing in the world more perilous to a soul than vainglory.

Mayumi Taguchi

Osaka Sangyo University

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