institution of a natural order and government of one by another in the parts of the body; and the creation of disease is the production of a state of things at variance with this natural order?

True.

And is not the creation of justice the institution of a natural order and government of one by another in the parts of the soul, and the creation of injustice the production of a state of things at variance with the natural order?

Exactly so, he said.

Then virtue is the health and beauty and well-being of the soul, and vice the disease and weakness and deformity of the same?

True.

And do not good practices lead to virtue, and evil practices to vice?