Peter Abelard (1079-1142), famous for his unhappy love story with Heloise, which he wrote down in his autobiographical work Historia calamitatum, was among the most respected scholars of his time. Brilliant as a philosopher and theologian, he was one of the co-founders of scholasticism, seeking to elucidate theological facts through logic. Scito te ipsum is one of the most important texts of the twelfth century. Only in the later phase of his life...