Physical causes are not the only ones which produce this painful state of feeling. It is often produced, in a moment, by hearing some unpleasant news, or by the occurrence of some disagreeable event. But as was hinted, when these people of nervous temperament are relieved from a fit of depression, their sky is uncommonly free from clouds- their hopes are lively, their spirits buoyant, and nothing can trouble them. These alternations of day and night, of sunshine and darkness, must of necessity affect the feelings in regard to all matters, temporal and spiritual- for as in a dark night every object appears black, so when the mind is overcast with gloomy clouds, every view must partake of the same aspect.