Hebrews 1 – What does it mean that He sat down at the right hand of the Father? 2018

Heb 1:3
And He is the radiance of His glory and the exact representation of His nature, and upholds all things by the word of His power. When He had made purification of sins, He sat down at the right hand of the Majesty on high;

Yeshua is the brightness of His Father's glory. (John 14:9-10). He is the express image of His person (essence) (Col. 1:15-16). Yeshua upholds all things because He is the Word of His Father's power (Col. 1:17-18). He purged our sins 1 John 1:7) and sat down at the right hand of the Majesty on high (Col. 3:1). What does it mean that He sat down at the right hand of the Father? The right hand of the Father is symbolic of His power and righteousness (Ex. 15:6, Psalm. 44:3, 48:10). But why is Yeshua now sitting at the right hand of the Father? He is to sit there until He makes His enemies His footstool (Psalm 110). There He waits until that day.
The book of Hebrews was most likely written by the Apostle Paul (Shaul). Many would argue that point, but arguing authorship is just simply a waste of time. The love that Paul had for Hebrews is evident in his other writings such as Romans. To say that this letter is from Paul is consistent with his other letters.

Paul starts by telling us that Elohim has spoken in time past through the prophets, but has recently spoken to us in these last days in His Son. The term "last days" is a reference to the time between the first arrival of Messiah to the time of His return and beyond. We are in the "last days" spoken of in Scripture. He also created all things through His Son.

To understand this letter (and Messiah Himself), one must lose the pagan concept of the Trinity and understand that Messiah is just as He is described in Scripture. He is literally the spoken word of the Father that became flesh and dwelt among us. Nothing more. Nothing less.