Full Idea
I believe that our thought is completed and terminated more in the notion of the dynamic [i.e. force] than in that of extension.
Gist of Idea
Thought terminates in force, rather than extension
Source
Gottfried Leibniz (Letters to Burcher De Volder [1706], G II 170), quoted by Daniel Garber - Leibniz:Body,Substance,Monad 4
Book Reference
Garber,Daniel: 'Leibniz: Body, Substance, Monad' [OUP 2009], p.164
A Reaction
Presenting this as the place where 'our thought' is 'terminated' seems to place it as mainly having a role in explanation, rather than in speculative metaphysics.