Walk According to This Rule

What a great and gracious thing it is to be "in" Christ Jesus. To be in Christ Jesus is to spiritually be placed in union with Christ; an actual and real union where you are one spirit with Him. 1st Corinthians 6: 17 says: "But he who is joined to the Lord is one spirit with Him." And to bring this union between ourselves and the Lord Jesus about, we had to be bought at a price; the price of the shedding of the precious blood of the Lord Jesus. Therefore, we are to glorify God with our body, and in our spirit, which are God's, it says in verse 20 of that same chapter of 1st Corinthians. When you are "in" Christ Jesus, neither circumcision nor uncircumcision avails anything, but a new creation.
At this time I want to ask 3 questions which will help us to open of the meaning of these two verses. ‎1st – Why, if you are in Christ Jesus, does neither circumcision or uncircumcision ‎avail anything?‎ 2nd – What is the rule that Christians are supposed to walk accord to? And 3rd – What are the results to all Christians if they are walking according to this rule? I pray that the truth that we are studying here will have a good impact upon your mind and heart, according to the Holy Spirit's working.