that it only is truly odious and shameful: who know moreover, that this transgressor, whosoever he be, is my kinsman, not by the same blood and seed, but by participation of the same reason, and of the same divine particle; How can I either be hurt by any of those, since it is not in their power to make me incur anything that is truly reproachful? or angry, and ill affected towards him, who by nature is so near unto me? for we are all born to be fellow-workers, as the feet, the hands, and the eyelids; as the rows of the upper and under teeth: for such therefore to be in opposition, is against nature; and what is it to chafe at, and to be averse from, but to be in opposition? Mortality salience Seneca's Epistulae Morales ad Lucilium advise Lucilius Junior to meditate on death. Later, Epictetus was reported by his students in his Discourses to advise reminding oneself of the impermanent nature of things and the mortality of living beings. Memento mori (Latin 'remember death'), or contemplation of death, is considered by the Stoics to be one form of negative visualization, since it trains the practitioner of the inevitability of death, whether that of the practitioner, of one's loved ones, or of everyone. See also Defensive pessimism Citations Cyrenaic school Meditation Philosophy of life Psychotherapy Spiritual practice Stoicism