Many people confuse sadness with depression. While sadness is a small part of depression that promotes feelings of anxiety, remorse and dejection, it cannot be misinterpreted as depression itself.
Sadness is a temporary emotion that may be triggered rather than appearing on its own. It is a feeling that comes and goes for brief moments, but does not leave a lingering gloom. On the other hand, depression can come at any time, without any reason and can last for the longest of time, affecting the peace of mind, physical health and the spirit of the soul.