The trouble is that all too many people have used the word depression to describe sadness and the connotation of depression is very serious generally requiring therapeutic intervention

The trouble is that all too many people have used the word depression to describe sadness and the connotation of depression is very serious generally requiring therapeutic intervention and if a biochemical basis for the depression, medication.  Consequently, it is important to understand the difference in sadness and depression.

Do you see a difference between sadness and depression? Explain.