Full Idea
The true practical philosophy consists in good rules for education, intercourse and sociability among men, rather than in general precepts on virtues and duties.
Gist of Idea
We want good education and sociability, rather than lots of moral precepts
Source
Gottfried Leibniz (Letters to Bouvet [1697], p.165)
Book Reference
Leibniz,Gottfried: 'Leibniz Selections', ed/tr. Wiener,Philip P. [Scribners 1951], p.105
A Reaction
I would interpret that as saying that the main aim of morality is to enable people to hold a good conversation. I've heard worse theories of morality. The remark shows why Leibniz has little to say explicitly about morality.