The individual comprehends its strengths and weaknesses through which adversity circumstances bring out. Like the saying,"what doesn't kill you makes you stronger", is particularly used through those of developing character and individual as well. Qualities are also shown and brought out through the hardships that might have not been displayed during healthy situations.
Take Nelson Mandela for example, in 1962 he was arrested
for conspiracies of overthrowing the state therefore being sentenced to life imprisonment. Which he served 27 years, during the time of domestic, international and racial civil war fears, leading him to be released to help the government during those hardships. Mandela helped and later in 1994 he became President of South Africa.
Another example is famous rapper Eminem, whose rough childhood brought him to where he is at right now. He was bullied from school constantly. His mother, struggled financially to help out.