Marcus Aurelius was a Roman Emperor and Stoic philosopher, widely recognized for his profound insights into human nature and the practice of virtue.

"The happiness of your life depends upon the quality of your thoughts."

"You have power over your mind, not outside events. Realize this, and you will find strength."

"Waste no more time arguing about what a good man should be. Be one."

"If it is not right, do not do it; if it is not true, do not say it."

"When you arise in the morning, think of what a privilege it is to be alive."

"The best revenge is to be unlike him who performed the injury."

"Confine yourself to the present."

"It is not death that a man should fear, but he should fear never beginning to live."

"Look well into thyself; there is a source of strength which will always spring up."

"He who lives in harmony with himself lives in harmony with the universe."

"Reject your sense of injury and the injury itself disappears."

"The soul becomes dyed with the color of its thoughts."

"What we do now echoes in eternity."

"Accept whatever comes to you woven in the pattern of your destiny."

"Perfection of character is this: to live each day as if it were your last."

"Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth."

"The impediment to action advances action. What stands in the way becomes the way."

"Observe constantly that all things take place by change."

"Do every act of your life as though it were the very last act of your life."

"To live happily is an inward power of the soul."