If There Is a God, Why Do We Suffer?

The question has been around for millenia. If God is all-powerful, all-knowing, and benevolent, why do people suffer? The answer seem obvious to many (most?) people. It's because of free will. It's because of sin. Its because of the devil or other evil powers. It's because God is testing us. It's to make us appreciate the good. It is to make goodness possible. It will all be resolved in the afterlife. It's a mystery that only God can answer. Pick your answer. There other options are out there! But is any of them ultimately satisfying? Do they really explain the problem? If not, where does that leave us? Is belief in an all-powerful, loving God possible?