STOIC
Of or pertaining to the school of philosophy founded by Zeno who taught that people should be free from passion, unmoved by joy or grief and submit without complaint to unavoidable necessity."
STOICAL
Impassive; characterized by a calm, austere fortitude
Synonyms
Imperturtabable indifferent cool
It reminds me of Buddhists who believe we should not be attached to OUTCOMES.
Accepting.