John Calvin, Institutes IV.10.29-30:
"the hours set apart for public prayer, sermon, and solemn services; during sermon, quiet and silence, fixed places, singing of hymns, days set apart for the celebration of the Lord’s Supper, the prohibition of Paul against women teaching in the Church, and such like....things of this nature are not necessary to salvation, and, for the edification of the Church, should be accommodated to the varying circumstances of each age and nation, it will be proper, as the interest of the Church may require, to change and abrogate the old, as well as to introduce new forms. I confess, indeed, that we are not to innovate rashly or incessantly, or for trivial causes. Charity is the best judge of what tends to hurt or to edify: if we allow her to be guide, all things will be safe.
Things which have been appointed according to this rule, it is the duty of the Christian people to observe with a free conscience indeed, and without superstition, but also with a pious and ready inclination to obey. They are not to hold them in contempt, nor pass them by with careless indifference, far less openly to violate them in pride and contumacy. You will ask, What liberty of conscience will there be in such cautious observances? Nay, this liberty will admirably appear when we shall hold that these are not fixed and perpetual obligations to which we are astricted, but external rudiments for human infirmity, which, though we do not all need, we, however, all use, because we are bound to cherish mutual charity towards each other. This we may recognise in the examples given above. What? Is religion placed in a woman’s bonnet, so that it is unlawful for her to go out with her head uncovered? Is her silence fixed by a decree which cannot be violated without the greatest wickedness? Is there any mystery in bending the knee, or in burying a dead body, which cannot be omitted without a crime? By no means. For should a woman require to make such haste in assisting a neighbour that she has not time to cover her head, she sins not in running out with her head uncovered. And there are some occasions on which it is not less seasonable for her to speak than on others to be silent. Nothing, moreover, forbids him who, from disease, cannot bend his knees, to pray standing. In fine, it is better to bury a dead man quickly, than from want of grave-clothes, or the absence of those who should attend the funeral, to wait till it rot away unburied. Nevertheless, in those matters the custom and institutions of the country, in short, humanity and the rules of modesty itself, declare what is to be done or avoided."
