Vex not thy spirit at the course of things, they heed not thy vexations
The world is a living being - one nature, one soul. Keep that in mind.
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.
Thou art a little soul bearing about a corpse.
Give yourself a gift: the present moment.
No longer talk at all about the kind of man that a good man ought to be, but be such