Never let the future disturb you. You will meet it, if you have to, with the same weapons of reason which today arm you against the present.

Marcus Aurelius (121–180 CE) was a Roman emperor and Stoic philosopher known for his posthumously titled work, Meditations. Assumed to have been written for his own self-improvement, the book examines life experiences through the lens of Stoic principles, which emphasize living virtuously, rationally, simply, and with full responsibility for one’s actions and obligations.