Expressing gratitude may be one of the simplest ways to feel happier. Plus, nothing beats knowing that you feel appreciated. Expressing gratitude is a powerful tool, and we should use it in abundance.
In positive psychology research, gratitude is strongly and consistently associated with greater happiness. Gratitude helps people feel more positive emotions, relish good experiences, improve their health, deal with adversity, and build strong relationships.
The word gratitude is derived from the Latin word gratia, which means grace, graciousness, or gratefulness (depending on the context). In some ways gratitude encompasses all of these meanings. Gratitude is a thankful appreciation for what an individual receives, whether tangible or intangible. With gratitude, people acknowledge the goodness in their lives. In the process, people usually recognize that the source of that goodness lies at least partially outside themselves. As a result, gratitude also helps people connect to something larger than themselves as individuals — whether to other people, nature, or a higher power.
Source: Harvard Health Publication