Plutarch Conjugalia Praecepta 20

[20] Plato ¹ asserts that the state is prosperous and happy in which the people hear mine and not mine most rarely uttered, the reason being that the citizens, so far as in them lies, treat all things of real importance as common property. Much more should such expressions be eliminated from the married state; save that, as physicians tell us that blows on the left side of the body record the sensation on the right side, so, in the same way, it is a lovely thing for the wife to sympathize with her husband’s concerns and the husband with the wife’s, so that, as ropes, by being intertwined, get strength from each other, thus, by the due contribution of goodwill in corresponding measure by each member, the copartnership may be preserved through the joint action of both. For Nature unites us through the commingling of our bodies, in order that, by taking and blending together a portion derived from each member of a pair, the offspring which she produces may be common to both, so that neither can define or distinguish his own or the other’s part therein. Such a copartnership in property as well is especially befitting married people, who should pour all their resources into a common fund, and combine them, and each should not regard one part as his own and another part as the other’s, but all as his own and nothing as the other’s. As we call a mixture wine, although the larger of the component parts is water, so the property and the estate ought to be said to belong to the husband even though the wife contribute the larger share.

[20] Plato asserts those cities to be the most happy and best regulated where these expressions, This is mine, This is not mine, are seldomest made use of. For that then the citizens enjoy in common, so far as is convenient, those things that are of greatest importance. But in wedlock those expressions are utterly to be abolished. For as the physicians say that the right side being bruised or beaten communicates its pain to the left; so indeed the husband ought to sympathize in the sorrows and afflictions of the woman, and much more does it become the wife to be sensible of the miseries and calamities of the husband; to the intent that, as knots are made fast by knitting the bows of a thread one within another, so the ligaments of conjugal society may be strengthened by the mutual interchange of kindness and affection. This Nature herself instructs us, by mixing us in our bodies; while she takes a part from each, and then blending the whole together produces a being common to both, to the end that neither may be able to discern or distinguish what was belonging to another, or lay claim to assured propriety. Therefore is community of estate and purses chiefly requisite among married couples, whose principal aim it ought to be to mix and incorporate their purchases and disbursements into one substance, neither pretending to call this hers or that his, but accounting all inseparable peculiar to both. However, as in a goblet where the proportion of water exceeds the juice of the grape, yet still we call the mixture wine; in like manner the house and estate must be reputed the possession of the husband, although the woman brought the chiefest part.