The soul becomes dyed with the color of its thoughts.
It doesn't hurt me unless I interpret its happening as harmful to me. I can choose not to.
Let not your mind run on what you lack as much as on what you have already.
From the philosopher Catulus, never to be dismissive of a friend's accusation, even if it seems unreasonable, but to make every effort to restore the relationship to its normal condition.
The world is mere change, and this life, opinion.
Give full attention and devotion to each act.