To form this just taste is undoubtedly in your own power, but it is to reason and philosophy that you must have recourse; from them we must borrow the balance by which is to be weighed and estimated the value of every pretension that intrudes itself on your notice.
The general objection which is made to the introduction of philosophy into the regions of taste is, that it checks and restrains the flights of the imagination, and gives that timidity which an over-carefulness not to err or act contrary to reason is likely to produce.
It is not so. Fear is neither reason nor philosophy. The true spirit of philosophy by giving knowledge gives a manly confidence, and substitutes rational firmness in the place of vain presumption. A man of real taste is always a man of judgment in other respects; and those inventions which either disdain or shrink from reason, are generally, I fear, more like the dreams of a distempered brain than the exalted enthusiasm of a sound and true genius. In the midst of the highest flights of fancy or imagination, reason ought to preside from first to last, though I admit her more powerful operation is upon reflection.
I cannot help adding that some of the greatest names of antiquity, and those who have most distinguished themselves in works of genius and imagination, were equally eminent for their critical skill. Plato, Aristotle, Cicero, and Horace; and among the moderns, Boileau, Corneille, Pope, and Dryden, are at least instances of genius not being destroyed by attention or subjection to rules and science. I should hope, therefore, that the natural consequence likewise of what has been said would be to excite in you a desire of knowing the principles and conduct of the great masters of our art, and respect and veneration for them when known.