Full Idea
The good is divided into the virtuous, the pleasing, and the useful. ..The good is either pleasing or useful; and virtue itself consists of a pleasure of the mind.
Gist of Idea
The good is the virtuous, the pleasing, or the useful
Source
Gottfried Leibniz (New Essays on Human Understanding [1704], 2.20)
Book Reference
Leibniz,Gottfried: 'New Essays on Human Understanding', ed/tr. Remnant/Bennett [CUP 1996], p.162
A Reaction
I presume that the useful could be reduced to the pleasing. It strikes me as quite bizarre to define virtue as merely a pleasure of the mind. Aristotle says true virtue must also please the mind, but that is a different idea.