A.T. Robertson Commentary 2 Corinthians 3:10

"For verily that which hath been made glorious hath not been made glorious in this respect, by reason of the glory that surpasseth." — 2 Corinthians 3:10 (ASV)

In this respect (εν τουτω τω μερε). The glory on the face of Moses was temporary, though real, and passed away (verse 7), a type of the dimming of the glory of the old dispensation by the brightness of the new. The moon makes a dim light after the sun rises, "is not glorified" (ου δεδοξαστα, perfect passive indicative of δοξαζω).

By reason of the glory that surpasseth (εινεκεν της υπερβαλλουσης δοξης). The surpassing (υπερ-βαλλω, throwing beyond) glory. Christ as the Sun of Righteousness has thrown Moses in the shade. Cf. the claims of superiority by Christ in Mt 5-7.