More closely translated as: but in my opinion, all things in nature occur mathematically. | Note: "Mais" is French for "but" and the "but in my opinion" comes from the context of the original conversation. apud me omnia fiunt Mathematicè in Natura is in latin. | Sometimes the Latin version is incorrectly quoted as Omnia apud me mathematica fiunt. | Sources: Correspondence with Mersenne note for line 7 (1640), page 36, Die Wiener Zeit page 532 (2008); StackExchange Math Q/A Where did Descartes write...