This part of optics, when well understood, shows us how we may make things a very long distance off appear as if placed very close, and large near things appear very small, and how we may make small things placed at a distance appear any size we want, so that it may be possible for us to read the smallest letters at incredible distances, or to count sand, or seed, or any sort or minute objects.

If you know how many acres you have sown of each kind of corn, inquire how much the acre the soil of that land takes for sowing, and count the number of quarters of seed, and you shall know the return of seed, and what ought to be over.

In the beginning of time, light drew out matter along with itself into a mass as great as the fabric of the world.

Command that your marshal be careful to be present over the household, and especially in the hall, to keep the household, within doors and without, respectable, without dispute or noise, or bad words.

Command those that govern your house before all you household that they keep careful watch that all your household, within and without, be faithful, painstaking, chaste, clean, honest and profitable.

It is not possible for form to do without matter because it is not separable, nor can matter itself be purged of form.

Also see how many quarters of corn you will spend in a week in dispensable bread, how much in alms.