The term 'not showing feelings' can be summarized by the word 'STOICAL', which is defined as having or showing indifference to pleasure or pain; impassive. Stoicism is a school of Hellenistic philosophy founded by Zeno of Citium in Athens in the early 3rd century BC. It is a philosophy of personal ethics informed by its system of logic and its views on the natural world. Stoics focus on developing self-control and fortitude as a means of overcoming destructive emotions. They believe that by accepting the moment as it presents itself, one can achieve inner peace.