it is the body, and not the mind, which senses goes as follows: Whatever feels, lives; whatever lives, depends on nourishment; whatever lives and depends on nourishment grows; whatever is of this nature is in the end resolved into its basic principles; whatever comes to be resolved into its basic principles is a complex; every complex has its constituent parts; whatever this is true of is a divisible body. If therefore the human mind feels, it follows that it is a divisible body. (On the Ἀπάθεια (Apatheia) of the Human Mind 2.1) Because (on Amo's account) the human mind is by definition immaterial and not a divisible body (On the Ἀπάθεια (Apatheia) of the Human Mind 1.3), it therefore cannot be the case that the mind itself senses. Philosophical career and later life Amo returned to the University of Halle to lecture in philosophy under his preferred name of Antonius Guilelmus Amo Afer. In 1736 he was made a professor. From his lectures, he produced his second major work in 1738, Treatise on the Art of Philosophising Soberly and Accurately, in which he developed an empiricist epistemology very close to but distinct from that of philosophers such as John Locke and David Hume. In it he also examined and criticised faults such as intellectual dishonesty, dogmatism, and prejudice. In 1740, Amo took up a post in philosophy at the University of Jena, but while there he experienced a number of changes for the worse. The Duke of Brunswick-Wolfenbüttel had died in 1735, leaving him without his long-standing patron and protector. That coincided with social changes in Germany, which was becoming intellectually and morally narrower and less liberal. Those who argued against the secularisation of education (and against the rights of Africans in Europe) were regaining their ascendancy over those who campaigned for greater academic and social freedom, such as Christian Wolff. Amo was subjected to an unpleasant campaign by some of his enemies, including a public lampoon staged at a theatre in Halle. He finally decided to return to the land of his birth. He set sail on a Dutch West India Company ship to Ghana via Guinea, arriving in about 1747; his father and a sister were still living there. His life from then on becomes more obscure. According to at least one report, he was taken to a Dutch fortress, Fort San Sebastian in Shama, in the 1750s,