I feel all things we experience are meant for us to learn from. No matter how painful or hard or troublesome. I think bad things happen to us for a reason, so we can learn. The same way good things happen to us. It's good to learn that it can't rain all the time, nor can the sun always shine. We need a balance of light and dark, and if it seems the scales tip too far one way or the other, then we aren't learning whatever lessons life is sending to us. I believe the best thing to do is to find a reason to be happy, any reason, even in the darkest time.