Romans 8:10 Christ lives in our dead body providing life to live in our soul and through our body.

Romans 8:10

New King James Version

10 And if Christ is in you, the body is dead because of sin, but the Spirit is life because of righteousness.

If - meaning "because, since" .  K. Wuest uses, "But, assuming that Christ is in you,"...

He promised He'd not leave us.  He is in us.  His Spirit is in us.  Our Heavenly Father is in us.  We are sealed by them.  They are in active work in us until we die and they bring us to their eternal presence.

the body is dead because of sin,  

    implies our human bodies have been dying ever since we were born.  So the human body is already in a death state.  Why?  Because it is the penalty of sin that will be taken care of later.  Death to the body is on God's agenda.  We're not delivered from it yet.  But our human body is continually weak and dying in parts until we die in totality.

but the Spirit is life because of righteousness.  

    The Spirit of God is life and provides life because of the completed righteousness of Christ on the cross.  Christ fulfilled all righteousness for God.  He passed every temptation and suffering that He experienced in His 33 years.  Only because He fulfilled complete obedience till the moment of His death, only He could offer Himself as a perfect acceptable sacrifice for sinful man which would be pleasing to God.

Therefore, Jesus pleasing God to satisfy our obligation for the payment for sins, we are fully looked upon as sons and daughters, the judgement against us removed, love and grace now a new relationship to experience God's own life and the abilities to achieve righteousness like Him.

  John 6:63 "It is the Spirit Who gives life; the flesh profits (ABSOLUTELY) nothing; the words that I have spoken to you are spirit and are life."

Because the Spirit of the Lord lives in us.

 

we want to practice His ways,

 

live out His character,

 

express His will in the energized power of the Holy Spirit.  

 

The Spirit is life in us.  

 

It is the life of all three:  Father, Son, and Spirit.  

 

The same power that raised Jesus from the dead, lives in us.  

 

That life has power to overcome, to grow, to change and transform.  

 

The new man God has destined for us to be can be achieved when we choose to walk in the Spirit.  

 

That Spirit produces the righteousness of God.