God (THE LORD, JEHOVAH) had spoken by the “Son” before, for it was Christ WHO lead the Isrealites out of Egypt, He was the Rock in the wilderness. (1 Cor. 1:4) but it was mainly utterances spoken to prophets, yet now God would reveal Himself through the Son. He would manifest Himself in person, Immanuel, God with us.

The discussion is written from the view point of GOD THE FATHER, the One who is recognized by the Hebrews as God, confirming that the SON is truly God and Divine. Christ is presented as being in the express image of God, upholding all things by the word of His power, yet condescending to die for the sinful human race, to regain the lost inheritance, and then being exalted back to the right hand of the Majesty on high.

Has in these last days spoken unto us by his Son.

And it is in these "days" that Christ is called the SON OF GOD.

Luke 1.31,32,35
And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS.
He shall be great, and shall be called (future tense) the Son of the Highest:
And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called (future tense) the Son of God.

Whom he (GOD) hath appointed (the Son) heir of all things,

Christ is not "heir" because He was "generated" by God in dateless ages past in some purely "human" aspect of the word. This whole concept of "heir" has a spiritual meaning far different.

When the world was created it was given to "Adam, who was the son of God." Luke 3:38

But Adam sold his birthright there in the garden of Eden. He lost his inheritance, and mankind, as the sons and daughters of Adam lost their inheritance.

But by becoming the SECOND ADAM, (THE SON OF GOD) Christ regains the lost inheritance!

1 Corinthinians 15.47 The first man (Adam) is of the earth, earthy: the second man (Jesus) is the Lord from heaven.

And through HIM we inherit the kingdom--
our corruptable will put on incorruption and we shall be changed and the sting of death will be conquered. The victory being THROUGH CHRIST. (See the rest of 1 Cor. 15)

Gal. 4.7
Wherefore thou art no more a servant, but a son; and if a son, then an heir of God through Christ.

Christ INHERITS the lost inheritance and THROUGH HIM we inherit the lost inheritance as well!

By whom (the Son) also he made the worlds;

Col. 1.16 For by him (CHRIST) were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by him, and for him:

Who (the Son) being the brightness of his glory, and the express image of his person,

John 14:9 Jesus said, "he that hath seen me hath seen the Father; and how sayest thou then, Show us the Father?"
John 10.30 I and my Father are one.

and upholding all things by the word of his power,

While God the Father is all powerful,
Christ is also all powerful

Col. 2:8-10
"In Christ dwelleth all the fulness of the Godhead bodily. And ye are complete in him, which is the head of all principality and power:"

when he (Jesus) had by himself purged our sins, sat down on the right hand of the Majesty on high;

Hebs 10.12
This man, (Jesus) after he had offered one sacrifice for sins for ever, sat down on the right hand of God;

Jesus, having won back the inheritance! Entered the heavenly sanctuary as our high Priest that now we

Heb. 10.19-20
Having therefore, brethren, boldness to enter into the holies by the blood of Jesus,
By a new and living way, which he hath consecrated for us, through the veil, that is to say, his flesh;

Being made so much better than the angels,

Heb. 2.9
Now, we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man.

For HE, CHRIST--

Phil. 2.6-9
Who, being in the form of God, thought it not robbery to be equal with God:
had made himself of no reputation, and took upon him the form of a servant, and was made in the likeness of men:
And being found in fashion as a man, he humbled himself, and became obedient unto death, even the death of the cross. Wherefore God also hath highly exalted him, and given him a name which is above every name:"

as he (Jesus, the Lamb of God) hath by inheritance obtained a more excellent name than they.

By HIS DEATH and resurrection Christ has regained the inheritance-- something no angel could do-- something no created or derived being could do.

For unto which of the angels said he (the Father) at any time, Thou art my Son, this day have I begotten thee? And again, I will be to him a Father, and he shall be to me a Son? And again, when he bringeth in the firstbegotten into the world,

When He was BORN INTO THE WORLD--
He "shall be called the Son of God" Luke 1:32,35

Gal. 4.4,5
But when the fulness of the time was come, God sent forth his Son, made of a woman, made under the law, To redeem them that were under the law, that we might receive the adoption of sons.

And He, Jesus, as He traveled the dusty roads of Palestine, looked to God in heaven--His Father-- His God.

He (the Father) saith, And let all the angels of God worship him (Jesus).

Rev.5:9
Thou art worthy ..for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;
And I beheld, and I heard the voice of many angels round about the throne and the beasts and the elders: and the number of them was ten thousand times ten thousand, and thousands of thousands; Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing.

unto the Son (Jesus Christ) he (the Father) saith, Thy throne, O God, is for ever and ever: a sceptre of righteousness is the sceptre of thy kingdom.

Christ IS GOD as the Father is GOD!

God the Father bears witness to Christ’s deity, for here He addresses the Son as God! God the Father says to the Son, Thy throne, O GOD, is forever and ever. Christ’s throne. The Father says, Christ is God and His--Christ’s-- throne is forever-- for He is King of kings and Lord of lords.

1 Timothy 6:14-16
Our Lord Jesus Christ: Which in his times he shall show, who is the blessed and only Potentate, the King of kings, and Lord of lords; Who only hath immortality, dwelling in the light (GOD's LIGHT) which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen.

How can Christ ALONE have immortality? Because He and the Father are ONE GOD, and only God has original immortality. Christ IS THE LORD OF LORDS and KING OF KINGS!

Rev. 17.14
The Lamb shall overcome them: for he is Lord of lords, and King of kings:
Rev. 19:16 (He shall ride forth on the white horse) And he has on his vesture and on his thigh a name written,” KING OF KINGS, AND LORD OF LORDS.

For Rev. 22.1 Water of life, clear as crystal, proceeding out of the throne (singular) of God and of the Lamb.
Rev. 22:3 The throne (singular) of God and of the Lamb shall be in it; and his servants shall serve him:
Rev. 7.17 For the Lamb which is in the midst of the throne shall feed them, and shall lead them unto living fountains of waters:

For Duet. 6.4 The LORD our God is one LORD:

There is only ONE God, and ONE throne of God. And Christ shares that throne with the Father and the Holy Ghost who also preceeds from the throne of God.

Thou hast loved righteousness, and hated iniquity; therefore God, even thy God, hath anointed thee with the oil of gladness above thy fellows.

Now it is no longer possibly for angels or humans to accuse God-- and say "for you it is an easy thing to be make the highest moral requirements of your subjects while you, yourself live above obedience and are all sufficient in yourself . You cannot understand our situation and all our the difficulties, with which we have to fight, you don’t know what it’s like to be a created being in subjection, we do not trust you." No, that charge is forever destroyed, for the Bible explains that Christ is tried "in everything like we, but without sin" (Heb. 4.15)

It was God, for Christ is fully God, who yet fully and completely took upon Himself humanity, refusing to use the power of His Divinity, and depending totally, as any human must, upon the Father. Yes, the Father was HIS GOD. Yet it was the ONE who was equal in all ways to the Father, Who took on humanity and Who struggled in the Garden to submit His human will to the will of the Father.

And, Thou, Lord, in the beginning hast laid the foundation of the earth; and the heavens are the works of thine hands: They shall perish; but thou remainest; and they all shall wax old as doth a garment; And as a vesture shalt thou fold them up, and they shall be changed: but thou art the same, and thy years shall not fail.

In these verses God the Father bears witness to the eternal nature of Christ, for the things of earth and of the heavens shall perish but THOU ART THE SAME AND THY YEARS SHALL NOT FAIL.

“Christ is God essentially and in the highest sense, if He is not self-existent and self-existing, then we have a saviour who is not God in himself, who owes his life to another, who has had a beginning and may, therefore, have an end. Thus Christ’s saving work sinks into insignificance. God simply brought into existence a being who was to die for us; or perhaps more correctly, who was to die to save God from making any personal sacrifice. But this is belittling and derogatory to God and to His character.” (M.L. Andreason, "Faith of Jesus" p. 22)

But to which of the angels said he (the Father) at any time, Sit on my right hand, until I make thine enemies thy footstool? Are they not all ministering spirits, sent forth to minister for them who shall be heirs of salvation?" Hebrews 1:1-14.

Christ is the ONE WHO won back the inheritance-- no angel could do that. The angels are sent forth to minister to those who CAN NOW be heirs, through Christ!