In the time of Marcus Aurelius these medical dreams had become more than ever a fashionable caprice.

Aristeides, the "Orator," a man of undoubted intellectual power, has devoted six discourses to their interpretation; the really scientific Galen has recorded how beneficently they had intervened in his own case, at certain turning-points of life; and a belief in them was one of the frailties of the wise emperor himself.

Partly for the sake of these dreams, living ministers of the god, more likely to come to one in his actual dwelling-place than elsewhere, it was almost a necessity that the patient should sleep one or more nights within the precincts of a temple consecrated to his service, during which time he must observe certain rules prescribed by the priests.
For this purpose, after devoutly saluting the Lares, as was customary before starting on a journey, Marius set forth one summer morning on his way to the famous temple which lay [30] among the hills beyond the valley of the Arnus.

It was his greatest adventure hitherto; and he had much pleasure in all its details, in spite of his feverishness.
Starting early, under the guidance of an old serving-man who drove the mules, with his wife who took all that was needful for their refreshment on the way and for the offering at the shrine, they went, under the genial heat, halting now and then to pluck certain flowers seen for the first time on these high places, upwards, through a long day of sunshine, while cliffs and woods sank gradually below their path.

The evening came as they passed along a steep white road with many windings among the pines, and it was night when they reached the temple, the lights of which shone out upon them pausing before the gates of the sacred enclosure, while Marius became alive to a singular purity in the air.