An unknown depression and despair, as if a ‘black cloud’ has suddenly descended for no apparent reason. The feeling comes and goes.
The brightness and joy of sunlight.
‘Those who are liable to times of gloom, or even despair, as though a cold dark cloud overshadowed them and hid the light and the joy of life. It may not be possible to give any reason or explanation for such attacks. Under these conditions it is almost impossible to appear happy or cheerful.’