
“The universe is change; our life is what our thoughts make it.”
The universe is flux, life is opinion.
The universe is transformation: life is opinion. (Long translation)
ὁ κόσμος ἀλλοίωσις, ὁ βίος ὑπόληψις.
IV, 3
Variant: Our life is what our thoughts make it.
Source: Meditations (c. 121–180 AD), Book IV