Offering a written expression of condolence (from the Latin word condolere, to grieve or to suffer with someone) used to be a staple of polite society. “A letter of condolence may be abrupt, badly constructed, ungrammatical — never mind,” advised the 1960 edition of Emily Post. “Grace of expression counts for nothing; sincerity alone is of value.”

But these days, as Facebooking, Snapchatting or simply ignoring friends has become fashionable, the rules of expressing sympathy have become muddied at best, and concealed in an onslaught of emoji at worst. “Sorry about Mom. Sad face, sad face, crying face, heart, heart, unicorn.” To read more from Bruce Feiler, click here.