After taking the "toga virilis" in 136, Marcus probably began his training in oratory. He had three tutors in Greek – Aninus Macer, Caninius Celer, and Herodes Atticus – and one in Latin – Fronto. The latter two were the most esteemed orators of their time, but probably did not become his tutors until his adoption by Antoninus in 138. The preponderance of Greek tutors indicates the importance of the Greek language to the aristocracy of Rome. This was the age of the Second Sophistic, a renaissance in Greek letters. Although educated in Rome, in his "Meditations", Marcus would write his inmost thoughts in Greek.