Compare Libanius, Orat. Parent. c. 53, p. 278, 279, with Gregory Nazianzen, Orat. iii. p. 68. Even the saint admires the speed and secrecy of this march. A modern divine might apply to the progress of Julian the lines which were originally designed for another apostate:-
--So eagerly the fiend,
O'er bog, or steep, through strait, rough, dense, or rare,
With head, hands, wings, or feet, pursues his way,
And swims, or sinks, or wades, or creeps, or flies.