The priesthood according to the New Testament is all about Christ and of Christ. Becoming a priest is a participation in His Priesthood.
Of course, Christ was made a man by God and not a woman; but pro-female priest ordination activists insist it does not matter at all. In their opinion, a woman can occupy the office of Christ just as a man can. Here, such people miss up what the church teaches about the complementary but different roles of both sexes in the church.
Even if the Church decides to overlook the sex differences, like the advocates of this cause do, we can't deny the fact that the tradition of ordaining only men as priests dates as far back as the choosing of the Apostles by Christ Himself.
What people who clamor for women priests fail to understand is, it goes beyond breaking a tradition. It is not just about giving a man the authority to administer the sacraments of a priest; it deposits an indelible spiritual character on him, and that is what really makes him a priest. And since Christ never chose a woman, only men can be ordained priests.
It goes beyond the Church refusing to ordain women as priests. Even when a Catholic Bishop chooses to do so, at the end of the whole ordination rite, the woman would still not be recognized as a priest because it would be against Church laws and regulations.