There is always a regular cyclic order in nature.sunrise and sunset,day and night,winter and summer,autumn and spring,growth and decay regularly follow each other.so is there a regular cyclic order in human life and fortunes ,joy and sorrow,rise and fall,success and failure,fortune and misfortune,birth and death successively follow each other.there cannot be permanent winter,as there cannot be a permanent spring,so,in life there cannot be a permanent period of misfortunes as there cannot be a permanent period of fortune.so man should have faith in the moral order of god.
No period of depression and misfortunes of failure and frustration,of sorrow and suffering can ever be a permanent phase of life.