“Mild depression is a gradual and sometimes permanent thing that undermines people the way rust weakens iron. It is too much grief at too slight a cause, pain that takes over from the other emotions and crowds them out. Such depression takes up bodily occupancy in the eyelids and in the muscles that keep the spine erect. It hurts your heart and lungs, making the contraction of involuntary muscles harder than it needs to be. Like physical pain that becomes chronic, it is miserable not so much because it is intolerable in the moment as because it is intolerable to have known it in the moments gone and to look forward only to knowing it in the moments to come. The present tense of mild depression envisages no alleviation because it feels like knowledge.”