Plotinos: Complete Works, v. 1 In Chronological Order,...

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.