One of the most basic facts about life is that in order to experience happiness, we need to experience its opposite as well. That is an undeniable law. Everything we go through in life is the result of our experiences, and everything we do is the result of how we respond to those experiences.
We learn to love and love more because we know how hate feels. We want to be with someone because we know what it's like to be alone. In other words, we need to go through the things we may not like in order to appreciate and enjoy the things we do like.
Unfortunately, there are those who do not get this simple truth. When some people trip over what seems to be a stumbling block, they don't look around and realize that it can be a stepping stone. When our lives are hit with trials and challenges, like sickness striking a family member or a loved one going wayward, many of us tend to see only the suffering stage. But there is a reason we are given such adversities - the pain of agony we endure is actually the prelude to something better.