The arts which produce sense-objects, such as architecture and
carpentry, have their principles in the intelligible world, and
participate in wisdom, so far as they make use of certain proportions.
But as they apply these proportions to sense-objects, they cannot
wholly be referred to the intelligible world, unless in so far as
they are contained within human reason. The case is similar with
agriculture, which assists the growth of plants; medicine, which
increases health, and (gymnastics) which supplies the body with
strength as well as vigor,[145] for on high there is another Power,
another Health, from which all living organisms derive their needed
vigor.