On 18 May 1787 he left Berlin to become a member of the Académie des Sciences in Paris, where he remained for the rest of his career. Lagrange survived the French Revolution while others did not and this may to some extent be due to his attitude which he had expressed many years before when he wrote:
On 18 May 1787 siya kaliwa Berlin na maging isang miyembro ng Académie des Sciences sa Paris, kung saan siya ay nanatili para sa natitirang bahagi ng kanyang karera. Lagrange survived ng French Revolution habang ang iba ay hindi at ito ay maaaring sa ilang mga lawak ay dahil sa kanyang attitude na kung saan siya ay nagpahayag ng maraming taon bago siya kapag wrote: