IF you are hasty, man, let it be your exercise to bear ill language patiently ; and when you are affronted, not to be angry.
EPICTETUS. DISCOURSES. Book iii. §12. ¶2
BUT if this be done for mere ostentation, it belongs to one who looks out and hunts for something external, and seeks for spectators to exclaim, "What a great man!" Hence Apollonius said well: “If you have a mind to exercise yourself for your own benefit, when you are choking with heat, take a little cold water in your mouth and spit it out again, and tell nobody."
EPICTETUS. DISCOURSES. Book iii. §12. ¶5
AN angry countenance is much against nature, and it is oftentimes the proper countenance of them that are at the point of death.
MARCUS AURELIUS. MEDITATIONS. Book vii. 18.