Нет худа без добра

There is always some comforting or bright side to a sad situation you may not be aware of See Не было бы счастья, да несчастье помогло (H)

Cf: Bad luck often brings good luck (Br.). Behind bad luck comes good luck (Am.). Every bitter has its sweet (Am.). Every black has its white (Br.). Every cloud has a silver lining (Am., Br.). Ill luck is good for something (Br.). The inner side of every cloud is bright and shining (Am.). It is an ill wind that blows nobody any good (Am,, Br.). Never an ill wind blows but that it doesn't do someone some good (Am.). Nothing so bad in which there is not something good (Am., Br.). There is nothing so bad in which there is not something good (Am.)