Peter Abelard antiquity for their virtues and for their discovery by the use of reason of many fundamental aspects of Christian revelation. At some point in this time Abelard wrote, among other things, his famous "Historia Calamitatum". This moved Héloïse to write her first Letter; the first being followed by the two other Letters, in which she finally accepted the part of resignation, which, now as a brother to a sister, Abelard commended to her. Sometime before 1140, Abelard published his masterpiece, "Ethica" or "Scito te ipsum" (Know Thyself), where he analyzes the idea of sin and that actions are not what
Bellum se ipsum alet Bellum se ipsum alet The Latin phrase bellum se ipsum alet () or bellum se ipsum alit (, ), and its German rendering "Der Krieg ernährt den Krieg" describe the military strategy of feeding and funding armies primarily with the resources of occupied territories. The phrase, coined by Ancient Roman statesman Cato the Elder, is primarily associated with the Thirty Years' War (1618–1648). The phrase "bellum se ipsum alit" was first mentioned in "Ab urbe condita libri" XXXIV,9,12, written by Roman historian Titus Livius (Livy) (59 BC-17 AD), who attributed it to Cato Marcus Porcius ("the Elder", 234–149 BC), a