But doubt can go bad; doubt can curdle like spoiled milk. Doubt can seep from the mind into the will and block courage and devotion. It can damage our capacity to persevere. It can make us indecisive. It can erode confidence. The Solidarity movement in Poland had a memorable slogan: “Pessimism of the mind, optimism of the will.” They understood that they faced uncertainty about their outcome, but they refused to allow the uncertainty of their success to weaken the strength of their devotion. Therapists