Chapter 64: The election of an abbot or abbess (paragraphs 1-2)

The grounds on which a candidate is elected abbot or abbess must be the quality of their monastic life and the wisdom of their teaching, even if they are the last in order in the community.

(From para. 1 of Ch. 64 of Saint Benedict's Rule, trans. by Patrick Barry OSB, 1997.)

What Benedict speaks of here I would call "substance" -- the quality of wisdom that comes from living and loving in the Spirit.