Romans 7:5

5 When we were living in the flesh (mere physical lives), the sinful passions that were awakened and aroused up by [what] the Law [makes sin] were constantly operating in our natural powers (in our bodily organs, in the sensitive appetites and wills of the flesh), so that we bore fruit for death.

The important Truth here in verse 5 is that the Holy Spirit writes that when we were in the flesh. He does not have Paul write that these passions are in our flesh now. I have found that most people still believe that we are limited by our flesh. They believe that our spirits are somehow the only things that our Father sent Jesus to deal with. How weak would salvation be if our Father knew that there was nothing good in our flesh and then He did nothing about it?

And may the God of peace Himself sanctify you through and through [separate you from profane things, make you pure and wholly consecrated to God]; and may your spirit and soul and body be preserved sound and complete [and found] blameless at the coming of our Lord Jesus Christ (the Messiah). 1 Thessalonians 5:23

    

And I will put my Spirit within you and cause you to walk in My statutes, and you shall heed My ordinances and do them. Ezekiel 36:27

We know that our old (unrenewed) self was nailed to the cross with Him in order that [our] body [which is the instrument] of sin might be made ineffective and inactive for evil, that we might no longer be the slaves of sin. Romans 6:6

Jesus came so that we could be one with Him right now, even while we are on this earth and even though we possess flesh. We are right now completely one with Jesus, John 17:23. How can Jesus be connected to sin, when He has died to sin once and for all, Romans 6:10? So it is impossible for us to still have a sin nature in our flesh and be one with Christ. 

Also notice what our Father tells us here in Romans 7:5, that the Law awakened and aroused a sinful attitude in us. I know that most people do not believe this, but it is the Truth, our Father made man to want to do what we are told not to do. He did this so that none of us could ever depend on ourselves. We were made to depend on our Father being greater in us. We were made to need Christ, John 15:5. 

For God has consigned (penned up) all men to disobedience, only that He may have mercy on them all [alike]. Romans 11:32