"Nothing has so much power to expand the mind as the ability to systematically and truly investigate all that is observable in life."
Source not yet traced to a specific passage, so treat the exact wording as unverified. See disputed and misattributed quotes.
Marcus Aurelius is one of the Stoic philosophers.
More quotes from Marcus Aurelius
- "Death smiles at us all; all we can do is smile back."
- "The best revenge is to become different from what he is who caused the offense."
- "Everything is just opinion and opinion can be overcome."
- "He who lives in harmony with himself lives in harmony with the universe."
- "The universe is transformation; our life is what our thoughts make of it."