John Steinbeck said this quote
“ I wonder about people who say they haven't time to think. For myself, I can double think. I find that weighing vegetables, passing the time of day with customers, fighting or loving Mary, coping with the children-- none of these prevents a second and continuing layer of thinking, wondering, conjecturing. Surely this must be true of everyone. Maybe not having time to think is not having the wish to think. ”