When did Yeshua receive authority? Did he not always have this authority even in eternity past?
In the beginning was the Word, and the Word was with God, and the Word was God. He was in the beginning with God. All things were made through him, and without him was not any thing made that was made. In him was life, and the life was the light of men. (
John 1:1–4)
Yeshua was — always has been, always will be — God and with all authority of God.
How much authority is included in “all authority in heaven and earth”?
The first thing to say is that this authority is not the authorization of Yeshua to eventually or
potentially rule, but the authorization of Yeshua to
actually rule as part of the Godhead even before taking on flesh. He has the assigned job of mediating and being the intercessor for sin. It was established before the creation of the world. Everything relating to dealing with sin, is under His authority, responsibility, and His control.
John 1:3 All things were made through him, and without him was not any thing made that was made.
Hebrews 1:3 (ESV) He is the radiance of the glory of God and the exact imprint of his nature, and he upholds the universe by the word of his power. After making purification for sins, he sat down at the right hand of the Majesty on high,
Colossians 1:17 (ESV) 17 And he is before all things, and in him all things hold together.
Isaiah 46:9–10 (ESV) remember the former things of old; for I am God, and there is no other; I am God, and there is none like me, 10 declaring the end from the beginning and from ancient times things not yet done, saying, ‘My counsel shall stand, and I will accomplish all my purpose,’