Institutio Oratoria

a teacher of oratory after careful observation of a boy's stylistic preferences, be they for terseness and polish, energy, dignity, charm, roughness, brilliance or wit, will so adapt his instructions to individual needs that each pupil will be pushed forward in the sphere for which his talents seem specially to design him;

for nature, when cultivated, goes from strength to strength, while he who runs counter to her bent is ineffective in those branches of the art for which he is less suited and weakens the talents which he seemed born to employ.

Now, since the critic who is guided by his reason is free to dissent even from