Any change in attitude changes the way one sees the world, and this in turn changes the way one acts.
One can learn to focus on "opportunity" as the gift within every given moment. This attitude towards life always improves the situation. Even in times of sickness, someone who habitually practices grateful living will look for the opportunity that a given moment offers and use it creatively.
Gratitude is here presented as more than a feeling, a virtue, or an experience; gratitude emerges as an attitude we can freely choose in order to create a better life for ourselves and for others. The Nigerian Hausa put it this way: Give thanks for a little and you will find a lot.