Acts 7:31 - Ellicott's Commentary On The Whole Bible

The voice of the Lord came unto him. — The speech agrees with Exodus 3:4 in ascribing the voice to the Lord, the Eternal, while the visible manifestation was that of the angel of the Lord. It hardly belongs to the interpretation of the speech to discuss the relation between the two statements. Speaking generally, it may be said that all, or nearly all, theophanies, or divine manifestations, in the Old Testament addressed to the sense of sight resolve themselves into angelophanies, all manifestations addressed exclusively to the sense of hearing into revelations by the Son, as the LOGOS, or eternal WORD.