Hebrews 12:25

him that speaketh Not Moses, as Chrysostom supposed, but God. The speaker is the same under both dispensations, different as they are. God spoke alike from Sinai and from heaven. The difference of the places whence they spoke involves the whole difference of their tone and revelations. Perhaps the writer regarded Christ as the speaker alike from Sinai as from Heaven, for even the Jews represented the Voice at Sinai as being the Voice of Michael, who was sometimes identified with "the Shechinah," or the Angel of the Presence. The verb for "speaketh" is χρηματίζοντα, as in Hebrews 8:5; Hebrews 11:7.

if they escaped not Hebrews 2:2-3; Hebrews 3:17; Hebrews 10:28-29.

much more On this proportional method of statement, characteristic of the writer, as also of Philo, see Hebrews 1:4; Hebrews 3:3; Hebrews 7:20; Hebrews 8:6.