What is your formal definition of stress? How does stress affect you in your everyday lives?

As once said by American actor Peter Marshall

"When we long for life without difficulties, reminds us that oaks grow strong in contrary winds, and diamonds are made under pressure” (About Health, 2014).

 What are your interpretations or thoughts about this stress-related quote? Do you agree that "diamonds are made under pressure" when referring to students in this scenario?