Eternal Inheritance from an Eternal Mediator

"And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance." (Hebrews 9: 15)

Today, we have an advocate at the right hand of God the Father:

"1My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous: 2And he is the propitiation for our sins: and not for ours only, but also for the sins of the whole world." (1 John 2: 1-2)

Jesus is identified as "the righteous", and in Christ we have been made the righteousness of God." (2 Corinthians 5: 21)

We have an everlasting righteousness because of Jesus Christ, too (Daniel 9: 24), because His blood cleanses us from all sin (1 John 1: 7) and speaks better things than the blood of Abel (Hebrews 12: 24)

This righteousness is an eternal inheritance, something which He gives, and that no one can take away:

"He that followeth after righteousness and mercy findeth life, righteousness, and honour. (Proverbs 21: 21)

and also

"For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life." (John 3: 16)

Then

"And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand." (John 10: 28)

and finally

"For if by one man's offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness shall reign in life by one, Jesus Christ." (Romans 5: 17)

We have the certainty of this eternal heritance because as our mediator, Jesus lives forever on our behalf:

"For there is one God, and one mediator between God and men, the man Christ Jesus;" (1 Timothy 2: 5)

and

"But now He has obtained a more excellent ministry, by as much as He is also the mediator of a better covenant, which has been enacted on better promises." (Hebrews 8: 6)

and also

"And for this cause he is the mediator of the new testament, that by means of death, for the redemption of the transgressions that were under the first testament, they which are called might receive the promise of eternal inheritance." (Hebrews 9: 15)

He has endless life, and therefore Jesus is our mediator of an eternal inheritance:

"[Jesus] only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see: to whom be honour and power everlasting. Amen." (1 Timothy 6: 16)

and

"5And it is yet far more evident: for that after the similitude of Melchisedec there ariseth another priest, 16Who is made, not after the law of a carnal commandment, but after the power of an endless life" (Hebrews 7: 15-16)

Jesus is our mediator, our representative before God the Father, and because He is eternal, and has granted us eternal life in Himself (1 John 5: 12), we can rest assured that we have an eternal inheritance yesterday, today, and forever (Hebrews 13: 8)