Therefore, I have attacted [the problem of the catenary] which I had hitherto not attempted, and with my key [the differential calculus] happily opened its secret. Acta eruditorum
![Therefore, I have attacted [the problem of the catenary] which I had hitherto not attempted, and with my key [the differential calculus] happily opened its secret. Acta eruditorum](http://cdn.quoteddaily.com/images/gottfried-leibniz/therefore-i-have-attacted-the-problem-of-the-catenary-which-i-had-hitherto-not-attempted-and-with-my-key-the.jpg)
Therefore, I have attacted [the problem of the catenary] which I had hitherto not attempted, and with my key [the differential calculus] happily opened its secret. Acta eruditorum