Henri Nouwen, on the need for human relationships, The Wounded Healer
A man can keep his sanity and stay alive as long as there is at least one person who is waiting for him. The mind of man can indeed rule his body even when there is little health left. A dying mother can stay alive to see her son before she gives up the struggle, a soldier can prevent his mental and physical disintegration when he knows that his wife and children are waiting for him. But when “nothing and nobody” is waiting, there is no chance to survive in the struggle for life. ... Thousands of people commit suicide because there is nobody waiting for them tomorrow. There is no reason to live if there is nobody to live for, 66-67.