1God, after He spoke long ago to the fathers in the prophets in many portions and in many ways,
2in these last days has spoken to us in His Son, whom He appointed heir of all things, through whom also He made the world.
3And He is the radiance of His glory and the exact representation of His nature, and upholds all things by the word of His power.
This is one of three passages that actually use the word (hupostasis) in them.
What is His nature?
Actually it's 5 and once in the LXX.
2 Corinthians 9:4 μή πως ἐὰν ἔλθωσιν σὺν ἐμοὶ Μακεδόνες καὶ εὕρωσιν ὑμᾶς ἀπαρασκευάστους καταισχυνθῶμεν ἡμεῖς ἵνα μὴ λέγω ὑμεῖς ἐν τῇ
ὑποστάσει ταύτῃ
2 Corinthians 11:17 ὃ λαλῶ οὐ κατὰ κύριον λαλῶ ἀλλ’ ὡς ἐν ἀφροσύνῃ ἐν ταύτῃ τῇ
ὑποστάσει τῆς καυχήσεως
Hebrews 1:3 ὃς ὢν ἀπαύγασμα τῆς δόξης καὶ χαρακτὴρ τῆς
ὑποστάσεως αὐτοῦ φέρων τε τὰ πάντα τῷ ῥήματι τῆς δυνάμεως αὐτοῦ καθαρισμὸν τῶν ἁμαρτιῶν ποιησάμενος ἐκάθισεν ἐν δεξιᾷ τῆς μεγαλωσύνης ἐν ὑψηλοῖς
Hebrews 3:14 14 μέτοχοι γὰρ τοῦ Χριστοῦ γεγόναμεν ἐάνπερ τὴν ἀρχὴν τῆς
ὑποστάσεως μέχρι τέλους βεβαίαν κατάσχωμεν
Hebrews 11:1 ἔστιν δὲ πίστις ἐλπιζομένων
ὑπόστασις πραγμάτων ἔλεγχος οὐ βλεπομένων
Hebrews 1 1 - 4 is the prologue to the Book of Hebrews.
Emboldened is the RSV translation of
hupostasis
RSV Hebrews 1:1 In many and various ways God spoke of old to our fathers by the prophets;
2 but in these last days he has spoken to us by a Son, whom he appointed the heir of all things, through whom also he created the world.
3 He reflects the glory of God and bears
the very stamp of his nature, upholding the universe by his word of power. When he had made purification for sins, he sat down at the right hand of the Majesty on high,
4 having become as much superior to angels as the name he has obtained is more excellent than theirs.
Which is giving credence to His deity of His God-man essential being (persona) or
karakter (χαρακτὴρ) in Hebrews 1:3..
His humanity part of the hypostatic
union is shown in the following::
Hebrews 2
5 For unto the angels hath he not put in subjection the world to come, whereof we speak.
6 But one in a certain place testified, saying, What is man, that thou art mindful of him? or the son of man, that thou visitest him?
7
Thou madest him a little lower than the angels; thou crownedst him with glory and honour, and didst set him over the works of thy hands:
8 Thou hast put all things in subjection under his feet. For in that he put all in subjection under him, he left nothing that is not put under him. But now we see not yet all things put under him.
9
But 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.
...
16
For verily he took not on him the nature of angels; but he took on him the seed of Abraham.
17 Wherefore in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people.
18 For in that he himself hath suffered being tempted, he is able to succour them that are tempted.
KTDNT - Essence.
HankD