Sallustius Quote

There is a certain force, less primary than being but more primary than the soul, which draws its existence from being and completes the soul as the sun completes the eyes. Of souls some are rational and immortal, some irrational and mortal. The former are derived from the first Gods, the latter from the secondary.

VIII. On Mind and Soul, and that the latter is immortal. - On the Gods and the Cosmos