Meditations — Marcus Aurelius

It contains an incredible amount of wisdom on topics like wealth, health, mental strength, habits, and happiness. 

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

“The happiness of your life depends upon the quality of your thoughts.”

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

“Very little is needed to make a happy life; it is all within yourself in your way of thinking.”