Throughout the letter to the Galatians, the Apostle Paul speaks against the party of the circumcised and the issue of circumcision. For us in the modern world, we ask the question why?
The matter of circumcision is both simple and complex. The simplicity is that it is a sign. The sign was given as a way for the people, especially the men, to remember who they were and the God they represented. For men it is a simple operation to show that at the most intimate level of life they are separated from the world and joined to God. In the current Jewish community the operation and accompanying ceremony are called a Bris.
The complexity comes from almost 2000 years of cultural and religious history. Here two problems arise. The first is it became a sign of your acceptability to God. The second problem comes about as one reads Galatians, is that it becomes closely tied to keeping the law. So ones acceptability to God is in keeping the law of which circumcision is a definite proof.
Actually, throughout the Old Testament and in the New Testament, God is asking for something more profound to show ones commitment to Him. What The Father is asking for is a Circumcised heart. This applies to everyone, male and female alike.
The good news is we are acceptable to God as we are. Keeping religious rules or traditions does not make one acceptable to God; only our heart relationship with Him can do that.
Several times God tells the nation of Israel to circumcise their heart to serve him. (Deuteronomy 10:16, 30:6; Jeremiah 4:4). Jesus telling us to love the Lord our God with our whole heart, soul, mind, and strength reinforces this. (Matthew 22:37) This is what God requires of us today, a circumcised heart.
It is for freedom that Christ has set us free. Stand firm, then, and do not let yourselves be burdened again by a yoke of slavery. ~ Galatians 5:1