People who have never dealt with depression think it's just being sad or being in a bad mood. That's not what depression is for me; it's falling into a state of greyness and numbness. — Dan Reynolds Sadness and depression are known words among us. Most of us get confused with these two words. Sadness and depression have two different meanings. It is important to identify those words to live a healthy life. Sadness is one of the basic emotions of a human. Happiness and sadness are a part of our daily life where the moods change according to the different situations. We feel this emotional state when we are unhappy. We might be sad when a particular situation is painful, disappointing, pressurizing, or upsetting. Depression is a broad topic to cover in psychology, which is continuous and last for a long time, but the sadness is short and temporary. Depression is an illness. People get depressed due to the continuation of sadness for a long period. Most people were under depre