The above post was mine. I didn't check the box, and it's not allowing me to edit it now. Also, from the link above, there is this:
"In Holy Communion, Our Lord takes possession of our whole being, so that the soul becomes subject to Him in humility, and the body in modesty and restraint. From which it follows that a person who goes to Communion must be different, even exteriorly, from one who does not.
Modesty in a woman is the sign that Jesus Christ dwells in her heart. It is a sweet perfume of edification which she is called upon to diffuse.
Modesty in dress and behavior is, therefore, an indispensable way of making us more attentive to the obligations which we contracted at our Baptism. It is a consequence of that dogma of Faith which tells us that the baptized soul is the dwelling of the Blessed Trinity and that the body is the Temple of the Holy Ghost. Saint Paul, infallibly inspired by God, tells us: "Know you not that your members are the temple of the Holy Ghost, Who is in you, Whom you have from God, and you are not your own?... Glorify and bear God in your body". (1 Cor.6:19-20).
Today's fashions, on the contrary, dishonor and corrupt the Christian woman. Their aim is to seduce and to arouse concupiscence, to the detriment of the soul's spiritual beauty, which is the true goal of our lives. All of this is a strategic Masonic maneuver. The destruction of Christian society, for which the Lodges have been working for two centuries, is to be realized through the destruction of the virtue of modesty in those who are baptized. This corruption, which has been deliberately and carefully programmed, is being systematically brought about.
It is, therefore, always necessary to remember the indispensable rules of Christian modesty, rules which are not to be practiced only in church! Let us, then, look at these rules, first in general, and then, in particular, with regard to assistance at Mass.
IN GENERAL, clothes should hide the shape of the body rather than accentuate it. Only this kind of clothing can truly be called "decent". This rule automatically excludes slacks (which are masculine apparel) for women. Feminine apparel is a skirt or a dress which must cover the woman's knees when she is seated. Decency in dress is to be observed, not only at Mass on Sundays, but every day of the week. The deciding factor is not whether slacks or culottes are more comfortable than a skirt, but rather to do the Will of God, by "loving Him in all things and above all things" (Collect of the 6th Sunday after Pentecost).
IN PARTICULAR, when attending Mass, we must be still more careful about how we dress. For instance, women must cover their heads: "Every woman praying ...with her head not covered, disgraces her head" (1 Cor.11:5). This rule has been the constant teaching of the Popes, and Pope St. Pius X had it included in the Code of Canon Law (Canon 1262). It is a sign of humility and submission for a woman to cover her head, and draws down God's graces and blessings upon her. Now is it an indifferent matter, just as no exterior act is an indifferent matter, for it proceeds from our very person and reveals what kind of person we are.
Both men and women must have their arms covered in church, even when the weather is warm. It is true that this is a sacrifice, and we should offer it to Our Lord, who suffered so much for us in His Body, in order to save us. Let us learn to imitate Him in mortifying our body.
We must hold to these rules, of which we are mentioning only the most essential, without human respect, especially in these times of ours. For, as Dom Bernard Marechaux used to say:
"The evil of our day is this: that the line of demarcation between Christian and non-Christian, between Christian and heretic, between Christian and idolater, is gradually fading away. The cancer of Liberalism attacks everyone and we must be careful not to be infected ourselves. Those who still call themselves Catholic live, too often, like those who have renounced this title. Women who go to church dress just the way women who do not go to church dress; they read the same books and magazines as these women; they go to the same – often immoral – shows as these women; they no longer pray or do penance. It is a confusion of license and worldliness. As a result of these customs, the Church is beginning to disappear in the world. Christianity is being lost. Only rarely does one find Catholics to whom the following words of Saint Paul can apply: "...be blameless and sincere children of God, without reproof, in the midst of a crooked and perverse generation; among whom you shine as lights in the world". (Phil.2:15). The early Christians stood out among the pagans like shining torches in the dark, and the example of their courage and their virtue attracted the pagans strongly to the Faith. This is something which we do not see today, except in rare cases. Everything is a mish-mash of unrestraint."
Pope Pius XII said substantially the same thing, in an allocution to young Catholic girls during World War II: (May 22, 1941):
"...Numbers of believing and pious women...in accepting to follow certain bold fashions, break down, by their example, the resistance of many other women to such fashions, which may become for them the cause of spiritual ruin. As long as these provocative styles remain identified with women of doubtful virtue, good women do not dare to follow them; but once these styles have been accepted by women of good reputation, decent women soon follow their example, and are carried along by the tide into possible disaster."