Life is difficult, the Buddha taught, for everyone. Suffering, he said, is the demand that experience be different than what it is. Of course, we do what we can to address pain. Sometimes illnesses are cured. Sometimes relationships are mended. Sometimes losses are recouped. Sometimes, though, nothing can be done. The Buddha’s teaching of liberation was that peace of mind is possible, no matter what the circumstances.
Sylvia Boorstein, It’s All Happening to All of us, All of the Time
Mindfulbalance 
It’s true that sometimes nothing can be done and peace within is all we need at such times