From the outside, patience looks like composure. From inside it looks like nothing at all: a waiting room, a four-year-old magazine, a clock checked four times in eleven minutes while you listen for a name.
That is the actual texture of the strongest thing people do, which is why it goes unrecognised in others and in yourself. Nobody feels heroic while waiting. The strength is being spent at the precise moment it feels most like nothing, and the persevering happens regardless, in the least dramatic form available.