“What does cause depression of spirits? Heavy head and heavy heart, and no sufficient reason for either, that I know of.”

Journal entry (2 March 1861), Ch. 5 : The Beginning of the War.
Lucy Larcom : Life, Letters, and Diary (1895)
Context: What does cause depression of spirits? Heavy head and heavy heart, and no sufficient reason for either, that I know of. I am out of doors every day, and have nothing unusual to trouble me; yet every interval of thought is clouded; there is no rebound, no rejoicing as it is my nature to rejoice, and as all things teach me to do. We are strange phenomena to ourselves, when we will stop to gaze at ourselves; but that I do not believe in; there are pleasanter subjects, and self is a mere speck on the great horizon of life.