English Language · Reading Comprehension

'There is a calm that does not waver, even when the world spins faster than it should. It is the quiet within, where emotion is felt but not allowed to reign. In moments of triumph, it does not boast; in times of loss, it does not collapse. This inner steadiness listens before it speaks, pauses before it acts. It is not passivity—it is resolve, tempered by reflection. When anger surges or fear beckons, it steps back, not away, and chooses stillness over storm. It is the strength to remain grounded while everything else shifts.' Based on the text above, what quality allows a person to remain grounded and composed while everything around them shifts?