It is not words that can make a stupid person learn something, but bad luck. -- Democritus

In the ups and downs of fate, it is easiest to see a person's integrity. --Shakespeare

Pity is caused by the love and luck of a person, and fear is caused by the similarity of the person who suffers misfortune to us. --Aristotle

One of the great advantages of outstanding people is their perseverance in adverse and difficult encounters. --Beethoven

Every setback or unfavorable mutation carries the same or larger beneficial seeds. --Emerson

Disaster is the first journey of truth. --Byron

Miracles often appear in times of misfortune. --Bacon

Isn't adverse luck the touchstone of character? --Balzac

Not every disaster is a disaster, early adversity is often a blessing. -- Sharp

Good times make our energy idle and useless, making us unable to feel our own strength, but obstacles awaken this strength and use it. --Hume

No wise man would deny the value of the exercise of pain and sorrow. --Huxley