A BlackBerry plays no role in my life, but I do carry a black Moleskine notebook in my jacket pocket.

Some of my written entries are practical. “Replenish checking account.” Grocery lists. CD rates. Names of favorite cheeses. Gifts to be purchased. Weather conditions. (Concerning the last, the French painter, Pierre Bonnard, commented on the weather in the notebook he carried. On a sunny day, he would write, “Beau.” When a strong, cold north-west wind was blowing through the Rhone valley, “Mistral.”)