From Bonhoeffer’s Discipleship on Matthew 6:25-34 —

Do not worry! Earthly goods deceive the human heart into believing that they give it security and freedom from worry. But in truth, they are what cause anxiety. The heart which clings to goods receives with them the choking burden of worry. Worry collects treasures, and treasures produce more worries. We desire to secure our lives with earthly goods; we want our worrying to make us worry-free, but the truth is the opposite. The chains which bind us to earthly goods, the clutches which hold the goods tight, are themselves the worries.

— Dietrich Bonhoeffer, Discipleship