Meditations 11.12

The spherical form of the soul maintains its figure when it is neither extended towards any object, nor contracted inwards, nor dispersed, nor sinks down, but is illuminated by light, by which it sees the truth,—the truth of all things and the truth that is in itself.

Marcus Aurelius, Meditations 11.12, translated by George Long

The soul is 'a sphere truly shaped,' when it neither projects itself towards anything outside nor shrinks together inwardly, neither expands nor contracts, but irradiates a light whereby it sees the reality of all things and the reality that is in itself.

Marcus Aurelius, Meditations 11.12, translated by C. R. Haines