According to the World Health Organization (WHO), mental health is a condition of well-being in which individuals recognize their own strengths, cope with daily challenges, work well, and contribute to their community.

Gratitude has long been recognized as a desirable attribute that can improve one's well-being, from ancient religious texts to modern, scientific evidence-based study. According to the evidence, the advantages of gratitude practice can be grouped into the following categories: increased happiness and life satisfaction; successful dealing with hardship; strengthened social relationships; improved health; and broadening civic, moral, and spiritual dimensions. However, gratitude is not an innate response to life conditions. It must be intentionally nurtured through gratitude-inducing activities. 

It's simple to see why focusing on what you have rather than what you don't is a good idea. Developing an appreciation for all of life's great qualities that you may have neglected allows you to focus on feelings of fulfillment, happiness, and abundance rather than longing, frustration, and bitterness. People who constantly reflect on their blessings are happier, better equipped to make decisions to improve their condition, and less prone to depression. People who start keeping a thankfulness journal regularly generally notice an improvement in their attitude. It's because gratitude lists are so popular. After all, they're a simple act that involves minimal effort, yet yields tremendous effects.