Full Idea
The very substance in things consists of a force for acting and being acted upon.
Gist of Idea
Substance is a force for acting and being acted upon
Source
Gottfried Leibniz (On Nature Itself (De Ipsa Natura) [1698], §08)
Book Reference
Leibniz,Gottfried: 'Philosophical Essays', ed/tr. Arlew,R /Garber,D [Hackett 1989], p.159
A Reaction
Garber places this text just before the spiritual notion of monads took a grip on Leibniz. He seems to have thought that only some non-physical entity, with appetite and perception, could generate force. Wrong.