Resilience

Here's a good article on resilience and overcoming, in the face of great adversity such as cancer. And how hope can keep people well, not only psychologically but also physiologically. (The flip side, of course, is the mystery that even the most hopeful and resilient person can die of cancer. Sometimes disease overtakes.)
Still, maintaining a sense of hopefulness is good for the soul, and for those who come in contact with us.