It isn't until the days of the uplifting language of Victoria's England that we begin to hear the proverbial form that we are now familiar with - 'every cloud has a silver lining'.
The first occurrence that is unequivocally expressing that notion comes in 'There's a silver lining to every cloud' was the form that the proverb was usually expressed in the Victorian era.
Though I would agree it is a horrible disaster, it has brought petroleum to the forefront of the minds of most Americans.
It will increase the precautions with which we drill for oil and make us more aware of its dangers.
The currently used 'every cloud has a silver lining' did appear, in another literary review, in 1849.
“A positive attitude may not solve all your problems, but it will annoy enough people to make it worth the effort." – Herm Albright.
The proverbial saying 'every cloud has a silver lining' is used to convey the notion that, no matter how bad a situation might seem, there is always has some good aspect to it.
This expression is usually said as an encouragement to a person who is overcome by some difficulty and is unable to see any positive way forward.
The complexity of mental disorders only adds to the depth and emotional connection that the characters and reader share.
Pat Peoples is right; every story has a silver lining.