We are bodies of flesh where our flesh will always cry out to be fed.  The food the flesh cries for is of this world and rooted in sin.  Our flesh is the house for sin to live and flourish.  Jesus came to set us free from our flesh and the power of sin that has a hold of us.  He laid down His life, and we too must lay down our lives – to kill it Rom 6:11.  See Romans 6, 7 & 8.  This is what He means when He says that we must deny ourselves, and take up our cross daily.  For we must daily nail this flesh to the cross. Matt 16:24.

The Word, who is Jesus (John 1:1-5) does not abide in the flesh, but in the Spirit.  Since this is true, we must as believers in Jesus Christ, make our habitation with our God, not in our flesh but in Spirit and Truth as God desires John 4:23-24, where we become temples for Him to dwell 1 Cor 6:19-20 2 Cor 6:16.  For our flesh is finite, and cannot accommodate the Word of God because He is everlasting:

having been born again, not of corruptible seed but incorruptible, through the word of God which lives and abides forever,  because

“All flesh is as grass,
And all the glory of man as the flower of the grass.
The grass withers,
And its flower falls away,
 But the word of the Lord endures forever.”

Now this is the word which by the gospel was preached to you. 1 Peter 1:23-24

To the degree that we throw off our flesh, is how much we can receive the things of the Spirit & Truth.  To live according to our carnal minds we are blinded against the truth of God so we cannot hear what the Spirit teaches nor discern what is of the Spirit 1 Pet 1:2-9.

But God has revealed them to us through His Spirit. For the Spirit searches all things, yes, the deep things of God. For what man knows the things of a man except the spirit of the man which is in him? Even so no one knows the things of God except the Spirit of God.  Now we have received, not the spirit of the world, but the Spirit who is from God, that we might know the things that have been freely given to us by God.

These things we also speak, not in words which man’s wisdom teaches but which the Holy Spirit teaches, comparing spiritual things with spiritual.  But the natural man does not receive the things of the Spirit of God, for they are foolishness to him; nor can he know them because they are spiritually discerned. 1 Cor 2:10-14

Our spirit increases in the Spirit of God as we (our flesh) decrease and is evident because we no longer doubt our position in the Lord.  Col 2:1-3, 1 Thess 1:2-10.  We move in His Power, so we may overcome in the battle of sin and our flesh 1 John 3:9,  1 John 5:4.  We testify Jesus Christ by our example 1 Pet 1:1-3 1 Pet 2:12 Rev 12:11. By His Spirit, we can love God with all our heart, mind and soul and grow in our faith in Him in obedience and holiness.  By His Spirit, we separate ourselves from what is of the world and our desire becomes less and less for it.  Why and how is this?  Because by His Spirit He writes His laws in our hearts and gives us a new heart that would desire the things of God and obey them Heb 8:10.

Where does this leave us?  To make it our mission to understand and walk in who we are:  We are a people who are filled with the Spirit of the Living God, who can access God directly in prayer, have fellowship with Him, and offer Him (acceptable) worship.  We are given all good things about life and godliness 2 Pet 1:3-4.  We are beacons to and for the world.  For life in Jesus Christ, is not about us- our needs our problems our issues!  It is about us, living IN CHRIST.  When our life becomes – IN Christ,  we are no longer living for ourselves which is in the flesh and according to this world, but for Christ where He becomes our all in all Col 1:15-18.  And this truly is Good!

Related:  What is the Good News Anyways?   Jesus, a good idea or your reality?  Law of Christ  What Kind of House do you Keep?