And,
Thus David's Lyre didSaul's wild Rage controul,
And tune the harsh Disorders of his Soul.
This may direct us to another Cause, from whence a Genius arises: A Genius that is formed and acquired. For the Turn that Education, Company, Business, the Taste of the Age, and above all, Principles of vitious or virtuous Manners, give to a Man's natural Capacities, is what chiefly forms his Genius. Thus we say of some, they have a rude unpolish'd Genius; of others, they have a fine, polite Genius. The manner of applying the natural Powers of the Mind, is what alone may produce the most different and opposite Genij. Libertine Principles, and Virtuous Morals, may form the Genius of a Rake, from the same natural Capacity, out of which Virtuous Principles might have form'd an Hero.
There is certainly in our natural Capacities themselves, a Fitness for some Things, and Unfitness for others. Thus whatever great Capacities a Man may have, if he is naturally timorous, or a Coward, he never can have a Warlike Genius. If a Man has not a good Judgment, how great soever his Wit may be, or polite his Manners, he never will have the Genius of a Statesman. Just as strong Sounds and brisk Measures can never touch the softer Passions. Yet as the Art and Skill of the Composer, is required to the Genius of Musick, so is a Knowledge of the Force and Power of the natural Capacity, and a judicious Application of it to the best and most proper Purposes, what forms a Genius for any Thing. This is the effect of Care, Experience and a right Improvement of every Advantage that offers. On this Observation Horace founded his Rules for a Poetical Genius.
Versate diu quid sere recusent
Quid valeant humeri.
And,
Ego nec studium sine divite vena,
Nec rude quid profit video ingenium.