HABITS ARE NOT CREATED, THEY ARE BUILT UPON Habits are like pearls. Oysters create natural pearls by accumulating layer upon layer of a nacre called mother-of-pearl, eventually forming the smooth treasure over several years. But what causes the nacre to begin forming a pearl? The arrival of a tiny irritant, such as a piece of grit or an unwelcome parasite, triggers the oyster’s system to begin blanketing the invader with layers of shimmery coating.
