The Thoughts is a series of personal reflections by Marcus Aurelius, Roman Emperor 161–180 CE, written over a series of years in far-flung places as he led the Romans in military campaigns, quashed revolts and dealt with the other tribulations of governing the Empire. It is best described as a spiritual journal, containing a record of the emperor's philosophical exercises.

This new edition of the Thoughts includes commentary and footnotes by Damian Stevenson, translator of Seneca's On the Shortness of Life.