"in these final days." This phrase refers to the time when Jesus began his ministry, extending until God establishes his complete rule in his creation.
# through a Son
"Son" here is an important title for Jesus, the Son of God. (See: [[rc://en/ta/man/translate/guidelines-sonofgodprinciples]])
The author speaks of the Son as if he will inherit wealth and property from his Father. Alternate translation: "to possess all things" (See: [[rc://en/ta/man/translate/figs-metaphor]])