Dic: expression/ “obscurely wise, and coarsely kind”

It's a very warm and kind description of a man by Samuel Johnson. Obscure means not clear, and implies confused, unwise. But the man in question is wise in an obscure way. Coarse means someone who talks and behaves in a rude and offensive way, so implies vulgar and crude. But the man in question is kind in a coarse way. Yes, I know some individuals have such a quality.

According to a book, Samuel Johnson employed that expression to describe Robert Levet in a poem "On the Death of Dr. Robert Levet." He also described him as an individual who, through his care and affection toward people around him, demonstrated "the power of art without the show." Some excerpt goes in this way:

His virtues walk'd their narrow round,
Nor made a pause, nor left a void;
And sure th'Eternal Master found
The single talent well employ'd.