If the study of all these sciences which we have enumerated, should ever bring us to their mutual association and relationship, and teach us the nature of the ties which bind them together, I believe that the diligent treatment of them will forward the objects which we have in view, and that the labor, which otherwise would be fruitless, will be well bestowed.
The Republic of Plato, translated into English, with an introduction, analysis, and notes. By J. Ll. Davies and D. J. Vaughan (ed. 1866)