Extemporaneous Lines on a Portrait of Lady Mary Wortley Montagu, Painted by Kneller

The playful smiles around the dimpled mouth,
That happy air of majesty and truth,
So would I draw: but, oh! 'tis vain to try,
My narrow genius does the power deny;
The equal lustre of the heavenly mind,
Where every grace with every virtue's join'd:
Learning not vain, and wisdom not severe,
With greatness easy, and with wit sincere;
With just description show the soul divine,
And the whole princess in my work should shine.