There are many things in the world we as humans can't control. For example, there may be a love one who has an illness that there is no cure for it. Doctors can only do so much. You can turn unto Jesus when hope is lost. In mark 2:23 Jesus says:

MARK 2:17

When Jesus heard it, he said to them. "Those who are well have no need of a physician, but those who are sick. I did not come to call the righteous, but sinners, to repentance."