4 ideas
Life is carried by two kinds of good: big bursts such as marriage and children, and little bursts such as a friendly store clerk or a waitress who remembers how you take your coffee. Loneliness sets in when those small bursts dry up, not only when the large ones fail.
At her son Christopher's wedding, Olive overhears the bride, Suzanne, calling her dress unflattering. She slips into the couple's bedroom, steals one of Suzanne's bras, draws a marker line down a favorite sweater, and takes a single shoe. The act is petty and hidden, a sign of how a parent who feels displaced and humiliated can turn to secret retaliation rather than speak the hurt aloud.
When Olive and Henry are taken hostage in a hospital bathroom during a robbery, fear strips away their restraint and each says cruel things about the other and about their son. Afterward, neither of them can take the words back or pretend they meant nothing. A marriage can hold together for decades on unspoken resentments, but once a moment of extreme stress puts them into words, the shared silence that protected the marriage is gone.
Olive is often not the central figure in her own book: she appears as a former teacher remembered by a suicidal ex-student, a stranger at a piano bar, a passing visitor at a funeral. Seeing someone mainly through how they figure in other people's lives shows that a harsh person can also be the one who offers the rescuing sentence at the right moment. Character is the total of these partial impressions, and no one sees all of them, not even the person.