“Only geometry can hand us the thread [which will lead us through] the labyrinth of the continuum’s composition, the maximum and the minimum, the infinitesimal and the infinite; and no one will arrive at a truly solid metaphysic except he who has passed through this [labyrinth].”
Nam filum labyrintho de compositione continui deque maximo et minimo ac indesignabili at que infinito non nisi geometria praebere potest, ad metaphysicam vero solidam nemo veniet, nisi qui illac transiverit.
Dissertatio Exoterica De Statu Praesenti et Incrementis Novissimis Deque Usu Geometriae (Spring 1676)
Source: Leibniz, Leibnizens Mathematische Schriften, Herausgegeben Von C.I. Gerhardt. Bd. 1-7. 1850-1863. Halle. The quotation is found in vol. 7. on page 326 in ”Dissertatio Exoterica De Statu Praesenti et Incrementis Novissimis Deque Usu Geometriae”. Link https://archive.org/stream/leibnizensmathe12leibgoog
Source: Geometry and Monadology: Leibniz's Analysis Situs and Philosophy of Space by Vincenzo de Risi. Page 123. Link https://books.google.no/books?id=2ptGkzsKyOQC&lpg=PA123&ots=qz2aKxAYtp&dq=Dissertatio%20Exoterica%20De%20Statu%20Praesenti%20et%20Incrementis%20Novissimis%20Deque%20Usu%20Geometriae%E2%80%9D&hl=no&pg=PA123#v=onepage&q&f=false
