“I have never made but one prayer to God, a very short one: Oh Lord, make my enemies ridiculous. And God granted it.”
— Voltaire, from a letter to Étienne Noël Damilaville
In 1733, the 39-year old Voltaire began a relationship with the Madame du Châtelet, a married mother of three. The pair would spend the next 15 years studying the natural sciences and becoming the leading French proponents of the work of English mathematician Isaac Newton.
But on a visit to Paris in 1744, Voltaire embarked on a new affair. His new lover was his sister’s daughter, Marie Louise Mignot (a/k/a Madame Denis). For obvious reasons, Voltaire and Madame Denis never married, though they lived together as husband and wife and stayed together until Voltaire’s death over 40 years later.