Gratitude is a powerful attitude that can strengthen you from the inside out. Studies have shown that the healthiest human emotion is not love but gratitude. Gratitude increases your immunity. It makes you more resistant to stress and less susceptible to illness. People who are grateful tend to be happy most of the time. Unlike people who are ungrateful who tend to be miserable and unhappy most of the time. If you cultivate an attitude of gratitude (of being thankful in everything), it will reduce the stress level in your life and strengthen you from the inside out.