Hebrews 2 -Life by the Spirit, Death by the Efforts of the Flesh

Romans 8

5 For they who are after the flesh do mind the things of the flesh (refers to Believers trying to live for the Lord by means other than Faith in the Cross of Christ); but they who are after the Spirit the things of the Spirit (those who place their Faith in Christ and the Cross, do so exclusively; they are doing what the Spirit desires, which alone can bring Victory).

CONTRAST

6 For to be carnally minded is death (this doesn’t refer to watching too much Television, as some think, but rather to trying to live for God outside of His Prescribed Order; the results will be sin and separation from God); but to be Spiritually minded is life and peace (God’s Prescribed Order is the Cross; this demands our constant Faith in that Finished Work, which is the Way of the Holy Spirit).
7 Because the carnal mind is enmity against God (once again, this refers to attempting to live for God by means other than the Cross, which places one “against God”): for it is not subject to the Law of God, neither indeed can be (in its simplest form means that what is being done, whatever it may be, is not in God’s prescribed order, which is the Cross).
8 So then they that are in the flesh cannot please God (refers to the Believer attempting to live his Christian Life by means other than Faith in Christ and the Cross).
9 But you are not in the flesh (in one sense of the word is asking the question, “since you are now a Believer and no longer depending on the flesh, why are you resorting to the flesh?”), but in the Spirit (as a Believer, you now have the privilege of being led and empowered by the Holy Spirit; however, He will do such for us only on the premise of our Faith in the Finished Work of Christ), if so be that the Spirit of God dwell in you (if you are truly saved). Now if any man have not the Spirit of Christ, he is none of His (Paul is saying that the work of the Spirit in our lives is made possible by what Christ did at Calvary, and the Resurrection).
10 And if Christ be in you (He is in you through the Power and Person of the Spirit [Gal. 2:20]), the body is dead because of sin (means that the physical body has been rendered helpless because of the Fall; consequently, the Believer trying to overcome by willpower presents a fruitless task); but the Spirit is life because of Righteousness (only the Holy Spirit can make us what we ought to be, which means we cannot do it ourselves; once again, He performs all that He does within the confines of the Finished Work of Christ).
11 But if the Spirit (Holy Spirit) of Him (from God) who raised up Jesus from the dead dwell in you (and He definitely does), He who raised up Christ from the dead shall also quicken your mortal bodies (give us power in our mortal bodies that we might live a victorious life) by His Spirit Who dwells in you (we have the same power in us, through the Spirit, that raised Christ from the dead, and is available to us only on the premise of the Cross and our Faith in that Sacrifice).

Swaggart, J. (2005). The Expositor’s Study Bible (p. 1984). Jimmy Swaggart Ministries.