Economics (7.20-7.21)

Nevertheless, those who mean to win store to fill the covered place, have need of someone to work at the open-air occupations; since ploughing, sowing, planting and grazing are all such open-air employments; and these supply the needful food.

Then again, as soon as this is stored in the covered place, then there is need of someone to keep it and to work at the things that must be done under cover. Cover is needed for the nursing of the infants; cover is needed for the making of the corn into bread, and likewise for the manufacture of clothes from the wool.