A reading, reflection and a desire to follow what Christ had handed down to the Apostles, and a fidelity to adhering and safeguarding Apostolic Tradition:
w2.vatican.va/content/john-paul-ii/en/apost_letters/1994/documents/hf_jp-ii_apl_19940522_ordinatio-sacerdotalis.html
From Ordination secerdotalis:
- Priestly ordination, which hands on the office entrusted by Christ to his Apostles of teaching, sanctifying and governing the faithful, has in the Catholic Church from the beginning always been reserved to men alone. This tradition has also been faithfully maintained by the Oriental Churches.
When the question of the ordination of women arose in the Anglican Communion, Pope Paul VI, out of fidelity to his office of safeguarding the Apostolic Tradition… These reasons include: the example recorded in the Sacred Scriptures of Christ choosing his Apostles only from among men; the constant practice of the Church, which has imitated Christ in choosing only men; and her living teaching authority which has consistently held that the exclusion of women from the priesthood is in accordance with God’s plan for his Church."(1)