Ability Quote by Anonymous
““Foreshadowings of the principles and even of the language of [the infinitesimal] calculus can be found in the writings of Napier , Kepler , Cavalieri , Fermat , Wallis , and Barrow . It was Newton 's good luck to come at a time when everything was ripe for the discovery, and his ability enabled him to construct almost at once a complete calculus.””