Assiduous learning...

And to acheive the eloquence of speech, one must have "Grammar to order expression; Didactic to give it point; Rhetoric to illustrate it; [and] Philosophy to perfect it," all together engendering, by graduated steps, the learned mind nd the cultivated soul. Underlying this method was the assumption that wisdom can be attained through assiduous learning. So the Renaissance provided both an ideal and a curriculum designed to realize that ideal.
~T. L. Simmons, Climbing Parnassus, p.98