The Torah calls circumcision a "sign of the union," a "sign of the covenant." Paul says that in Christ neither circumcision nor its absence means anything...
The Torah calls circumcision a "sign of the union," a "sign of the covenant." Paul says that in Christ neither circumcision nor its absence means anything. What does he want to say by this? The first thing that comes to mind is this: now that the Kingdom has entered the world through Christ, the former signs cease to play their role. Christ and the Kingdom are witnessed not by some special signs, even traditional ones filled with deep meaning, but by life itself, by word and deed.
However, Paul, as a rule, when speaking about circumcision, has Judaism in mind, and Judaism becomes for him a model of religion as such. He contrasts the circumcised with the uncircumcised in the same sense in which we today contrast religious people with secular people. By the uncircumcised the apostle means pagans, but it is important to keep in mind that the pagans of Paul's time were not especially religious in any way. They did, of course, sometimes remember their gods, but did not particularly believe in them. On holidays they still offered sacrifices to them by tradition, even publicly, but in everyday life the pagans of that time rarely remembered their gods.
This does not trouble the apostle at all: he considers that in Christian life religiosity is not the main thing, that the meaning of Christianity lies elsewhere, that it is not a religion. The main thing in Christian life is spiritual renewal; what matters is to become what Paul calls a "new creation."
The life of the Kingdom, permeated by the breath of God, renews a person if he comes to share in this life, changing his very nature, physical and psychological. A person quite really becomes different, and if this is not visible, it means that the person either has not yet become a Christian in the strict sense of the word, or the changes in him have not yet become noticeable.
Religion here can both help and hinder, like everything present in a person's life. In itself it is neither good nor bad; it can become an instrument helping a person on his way into the Kingdom, but it can also turn out to be an obstacle on that way. Before the apostle's eyes there were examples of both, and therefore he does not idealize religion, but neither does he demonize it, leaving it the place it deserves: the place of an instrument that each person uses either for his own benefit or to his own harm.