Optimism and Positive Thinking

DiscussionHow do you keep yourself in a good mood?How do you react to difficulties in life? Can you give an example?Do you think optimism is the key to a happy and better life?

Laughter is the sun that drives winter from human face.What is the figure of speech here? What does winter refer to?What is emphasized here?
Metaphor  winter: something bad, miserable or disappointing
The importance of optimism in terms of adversity