every cloud has a silver lining

еvery cloud has a silver lining -- нет худа без добра
look for/find a posirive lining -- искать/находить хорошее, позитивное

Optimists, for the most part, habitually look on the bright side, and they easily find silver linings. Life has a way of making the rich get richer and the happy get happier.

a blessing in disguise -- что ни делается, все к лучшему
blessing in disguise, IT S more like, well, when you were late for a crashed plane. That s what I think