The Throne of God is Forever

But unto the Son he saith, Thy throne, O God, is for ever and ever: a scepter of righteousness is the scepter of thy kingdom. Hebrews 1: 8

"This verse in Hebrews is a quote from the Old Testament found in Psalms 45: 6:

Thy throne, O God, is for ever and ever: the scepter of thy kingdom is a right scepter.

If you read all of Psalm 45, you will see in the context that it is addressing an earthly king who is righteous. The use of God in verse 6 is a title referring to a man in an exalted position.

When Paul wrote the epistle to the Hebrews, he knew that they would know and understand the record in Psalms. So Paul used the verse to address the son of God, Jesus Christ, because certainly Christ is in an exalted position, and he will be coming back as a King of Kings and Lord of Lords."

I liked this example because it clearly shows how intertwined the Old and New Testaments are. Paul took an idea from the Old Testament scriptures that most Israelites were familiar with and likened it to Christ. Thus he can reveal what the Psalm concealed.