Perfectionate

[P]ainters and sculptors, cjoosing the most elegant natural beauties, perfectionate the idea, and advance their art above Nature itself in her individual productions; which is the utmost mastery of human performance.

‘I agree with you,’ replied the stranger; ‘we are unfashioned creatures, but half made up, if one wiser, better, dearer than ourselves—such a friend ought to be—do not lend his aid to perfectionate our weak and faulty natures.’

If interrupted, he remonstrated pathetically with his little maid. Every great artist, he said, had need of solitude to perfectionate his works.