Don't worry about the future. Or worry, but know that worrying is as effective as trying to solve an algebra equation by chewing bubble gum. The real troubles in your life are apt to be things that never crossed your worried mind, the kind that blindside you at 4 p.m. on some idle Tuesday.
Mary Schmich (2012). “The Best of Mary Schmich: Selected Writings by the Chicago Tribune's Winner of the 2012 Pulitzer Prize for Commentary”, p.31, Agate Digital