The only way to form manners is to teach them from the beginning as a part of religion, as indeed they are.

Devotion to Our Lady will give to the manners both of boys and girls something which stamps them as Christian and Catholic, something above the world's level.

And, as has been so often pointed out, the Church's ritual is the court ceremonial of the most perfect manners, in which every least detail has its significance, and applies some principle of inward faith and devotion to outward service.
If we could get to the root of all that the older codes of manners required, and even the conventionalities of modern life--these remnants, in so far as they are based on the older codes--it would be found that, as in the Church's ceremonial, not one of them was without its meaning, but that all represented some principle of Christian conduct, even if they have developed into expressions which seem trivial.

Human things tend to exaggeration and to "sport," as gardeners say, from their type into strange varieties, and so the manners which were the outcome of chivalry--exquisite, idealized, and restrained in their best period, grew artificial in later times and elaborated themselves into an etiquette which grew tyrannical and even ridiculous, and added violence to the inevitable reaction which followed.

But if we look beyond the outward form to the spirit of such prescriptions as are left in force, there is something noble in their origin, either the laws of hospitality regulating all the relations of host and guest, or reverence for innocence and weakness which surrounded the dignity of both with lines of chivalrous defence, or the sensitiveness of personal honour, the instinct of what was due to oneself, an inward law that compelled a line of conduct that was unselfish and honourable.