Sadness is emotional pain with sorrow,pain, disadvantage. An individual experiencing sadness may become quiet and withdraw themselves from others. Crying is often an indication of sadness. sadness is one of the basic emotions and which has more effect on the human behavior.
Sadness can be viewed as a temporary lowering of mood, whereas depression is more chronic. There are numerous reasons to get sad and major ones being low mood in the day, loss of interest in the surroundings, trouble concentrating, sleeplessness and excessive mood swings.
Sadness is not as chronic as the depression but equally troubling so get out of the sadness one need to actively involved in activities surrounding him and enjoy what you are doing.