like the eleven other books, was for his own use; and if we may trust
the note at the end of the first book, it was written during one of M.
Antoninus' campaigns against the Quadi, at a time when the commemoration
of the virtues of his illustrious teachers might remind him of their
lessons and the practical uses which he might derive from them.

Among his teachers of philosophy was Sextus of Chaeroneia, a grandson of
Plutarch. What he learned from this excellent man is told by himself (i.
9). His favorite teacher was Q. Junius Rusticus (i. 7), a philosopher,
and also a man of practical good sense in public affairs. Rusticus was
the adviser of Antoninus after he became emperor. Young men who are
destined for high places are not often fortunate in those who are about
them, their companions and teachers; and I do not know any example of a
young prince having had an education which can be compared with that of
M. Antoninus. Such a body of teachers distinguished by their
acquirements and their character will hardly be collected again; and as
to the pupil, we have not had one like him since.

Hadrian died in July A.D. 138, and was succeeded by Antoninus Pius. M.
Antoninus married Faustina, his cousin, the daughter of Pius, probably
about A.D. 146, for he had a daughter born in 147. He received from his
adoptive father the title of Caesar, and was associated with him in the
administration of the state. The father and the adopted son lived
together in perfect friendship and confidence. Antoninus was a dutiful
son, and the emperor Pius loved and esteemed him.

Antoninus Pius died in March, A.D. 161. The Senate, it is said, urged M.
Antoninus to take the sole administration of the empire, but he
associated with himself the other adopted son of Pius, L. Ceionius
Commodus, who is generally called L. Verus. Thus Rome for the first time