I am capable of achieving greatness.

Greatness gets pictured as a moment: the stage, the announcement, the thing everybody saw. Ask anyone who has actually done something considerable and they describe a decade of Wednesdays.

A bricklayer's first course decides whether the wall stands. It is also the dullest part of the job, done kneeling, checked twice with a level, invisible in every photograph of the finished house.

Capability isn't a hidden reserve waiting for the right occasion. It's what you've been quietly assembling on ordinary days, most of which felt like nothing at the time.