None are so old as those who have outlived enthusiasm.

Interest is what keeps a life in motion, and its loss shows up long before the body’s does. Someone can be worn flat at thirty and still curious at eighty, and the difference is not cheerfulness but whether anything still pulls at them. Enthusiasm is not a mood you can decide to have. It usually comes from contact with something, and the contact is the part you can arrange.

Notice what quietly dropped off your life while you were busy. Put one of those things back on the calendar this week, at whatever scale is honestly available to you.