‘Depression is sadness gone wrong.’ —Lewis Wolpert
Spinoza is quoted approvingly […] to the effect that the free man is the one who thinks about, or fears, death the least. Such fear he considers to be a passive emotion, or affection, which is a bondage to pain, symptomatic of our impotence and servitude. Spinoza writes,
Hope is nothing else but an inconstant pleasure, arising from the image of something future or past, whereof we do not yet know the issue. Fear, on the other hand, is an inconstant pain also arising from the image of something concerning which we are in doubt. If the element of doubt be removed from these emotions, hope becomes Confidence and fear become Despair. In other words, Pleasure or Pain arising from the image of something concerning which we have hoped or feared.
The free man, in this light, is one who has not only cultivated the stronger active emotion of acquiescence to the univocal chorus of necessity, but has also learned to disengage external factors which are coincident with such passive emotions.