The soul becomes dyed with the colour of its thoughts. - Marcus Aurelius, Meditations

"Here is a rule to remember in future, when anything tempts you to feel bitter: not "This is misfortune,"but "To bear this worthily is good fortune."

"Observe the movements of the stars as if you were running their courses with them, and let your mind constantly dwell on the changes of the elements into each other. Such imaginings wash away the filth of life on the ground."

"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."

"What we cannot bear removes us from life; what remains can be borne."

"The happiness of your life depends upon the quality of your thoughts: therefore, guard accordingly, and take care that you entertain no notions unsuitable to virtue and reasonable nature."