The meaning of circumcision and the significant in the Bible?

“Colossians 2:11 says, “In Him also you were circumcised with the circumcision not made with hands, in the putting off of the body of the flesh, in the circumcision of Christ.”
Philippians 3:3 says, “for we are the circumcision, the ones who serve by the Spirit of God and boast in Christ Jesus and have no confidence in the flesh.”
These two verses show that circumcision is. Simply put, circumcision is the removal of flesh. What should be the attitude of those who are circumcised?. They should have no confidence in the flesh and should not put their trust in the flesh. (“confidence” in the original language used in bible can be translated as “trust”
Who are the circumcisions?
They are the ones, who serve by the Spirit of God and put no trust in the flesh,
Completely trusting God and not by his natural strength and mind.
What to do with the Christianity?
The “flesh” in col. 2:11 and Phi 3:3, is related to the matter of sins, Rom. 8:8
Says that “those who are in the flesh cannot pleased God.” We can’t do good and be kind person just to pleased God, God’s children should believing in the will of God and according to His will not as individual. The character of this is self-confident and will not glorifying God.
It is a pity that so many Christians are so confident about themselves, they know how to believe in the Lord Jesus Christ, and they know how to filled with the Holy Spirit. They know how to overcome, and they know how to live the Christian life. It seems that there is nothing that they do not know! They brag again and again about this and that kind of experience that they had on certain days of certain months. It seems that they are lacking in nothing! They may talk how they fellowship with God and how they communicate with God. They think that they know what God is saying concerning certain matters. They think that they know God’s will concerning many things. They talk about what God has told them to speak and pray at such and such a place and such and such a time. To them, it seems as if knowing God’s will is the easiest thing on earth! Yet they lack the mark of having “no confidence in the flesh,” such Christians are indeed in need of God’s mercy!
Conclusions:
The meaning of circumcision is to cut off the confidence of the flesh. it is to cut off the natural strength so that one no longer speaks and walks in a loose way, but instead becomes a fearful and trembling person.