You ask if there is no doctrine of sorrow in my philosophy. Of acute sorrow I suppose that I know comparatively little. My saddestand most genuine sorrows are apt to be but transient regrets. The place of sorrow is supplied, perchance, by a certain hard and proportionately barren indifference. I am of kin to the sod, and partake of its dull patience,--in winter expecting the sun of spring.

Letters to Various Persons (ed. 1865)