Fronto had warned Marcus against the study of philosophy early on: 'It is better never to have touched the teaching of philosophy...than to have tasted it superficially, with the edge of the lips, as the saying is'. He disdained philosophy and philosophers and looked down on Marcus's sessions with Apollonius of Chalcedon and others in this circle. Fronto put an uncharitable interpretation of Marcus's 'conversion to philosophy': 'In the fashion of the young, tired of boring work', Marcus had turned to philosophy to escape the constant exercises of oratorical training. Marcus kept in close touch with Fronto, but would ignore Fronto's scruples.