Douglas Steere remarks very perceptively that there is a pervasive form of contemporary violence to which the idealist fighting for peace by nonviolent methods most easily succumbs: activism and overwork. The rush and pressure of modern life are a form, perhaps the most common form, of its innate violence. To allow oneself to be carried away by a multitude of conflicting concerns, to surrender to too many demands, to commit oneself to too many projects, to want to help everyone in everything is to succumb to violence. More than that, it is cooperation in violence. The frenzy of the activist neutralizes his work for peace. It destroys his own inner capacity for peace. It destroys the fruitfulness of his own work, because it kills the root of inner wisdom which makes work fruitful.
Thomas Merton, Confessions of a Guilty Bystander, Image Books/Doubleday Religion, 1965–66. From the 2009 edition, p. 81. Love this. (It appears to me Merton is using activism to mean something slightly different from what we use it to mean now.)