Such as are thy habitual thoughts, such also will be the character of thy mind; for the soul is dyed by the thoughts.
A note to himself in Book 5 of the Meditations: the mind takes on the colour of what it dwells on, so the thoughts you keep returning to are worth choosing. The wording is George Long’s 1862 translation, which is in the public domain; modern translations phrase it differently.
If thou art pained by any external thing, it is not this thing that disturbs thee, but thy own judgement about it. And it is in thy power to wipe out this judgement now.
Nowhere either with more quiet or more freedom from trouble does a man retire than into his own soul.
The best way of avenging thyself is not to become like the wrong doer.
I learned that courage was not the absence of fear, but the triumph over it.
Cowards die many times before their deaths; / The valiant never taste of death but once.
Ever tried. Ever failed. No matter. Try again. Fail again. Fail better.