ISB ~ Hebrews 1 v2

these last days:An expression used in the Greek OT for the messianic age (Num 24:14; Is 2:2; Dan 10:14; Hos 3:5).

heir of all things:As all things were created through the Son as an instrument, so they return to him as an inheritance. Christ is thus the legal “first-born” (1:6) who inherits the cosmic estate of the Father (Col 1:15-16).

See word study:First-born.

• If the Son is the heir of all things, then he must be distinct from all things. If God created the world through him, then he cannot be one of its creatures, since he existed before them. No creature has its origin before the foundation of the world but is created in time. Only the Son exists timelessly with the Father and the Holy Spirit (cf. St. Cyril of Alexandria, Treasury of the Trinity 32).

the ages:Or “the world”—the Greek term can refer to space as well as to time (e.g., in 11:3, the world/ages refers to all that is “seen” in the visible universe).