the.com/stoicism

means A philosophy that teaches you to focus on what you can control — your judgments and reactions — and accept with equanimity what you can't.

from Named not for a mood but a porch. It traces to the Stoa Poikile, the 'Painted Porch' in ancient Athens, a public colonnade decorated with murals where the philosopher Zeno of Citium taught his followers. 'Stoic' simply meant 'of the porch' — the school took its name from its classroom. Over centuries the philosophy's emphasis on enduring hardship without complaint seeped into everyday English, until 'stoic' came to describe the unflinching temperament rather than the architecture that first housed it.