Quesnel is no doubt correct in taking this literally as alluding to the anointing of bishops at consecration: cf. Serm. IV. chap. 1. Sancti Spiritus unctio consecrat sacerdotes, and lower down he speaks of the effusum benedictionis unguentum: so also in Serm. LIX. chap. 7, sacratior est unctio sacerdotum.