Most of us experience a life full of wonderful moments and difficult moments. But for many of us, even when we are most joyful, there is fear behind our joy. We fear that this moment will end, that we won’t get what we need, that we will lose what we love, or that we will not be safe. Often, our biggest fear is the knowledge that one day our bodies will cease functioning. So even when we are surrounded by all the conditions for happiness, our joy is not complete.