"Depression is the most unpleasant thing I have ever experienced. . . . It is that absence of being able to envisage that you will ever be cheerful again. The absence of hope. That very deadened feeling, which is so very different from feeling sad. Sad hurts but it's a healthy feeling. It is a necessary thing to feel. Depression is very different."

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Though it is folly to suppose that happiness is a matter of volition, and that we can make ourselves content and cheerful whenever we choose - a theory that many poor hypochondriacs are taunted with till they are nigh driven mad - yet, on the other hand, no sane mind is ever left without the power of self-discipline and self-control in a measure, which measure increases in proportion as it is exercised.

— Dinah Maria Murlock Craik