The idea of a gratitude journal is to train your happiness muscle. Instead of focusing on negative things, it helps you to focus on the positive aspects of life. In this way, after writing more often in your journal, you reacquaint yourself on how to have an eye for and focus on the good things that life has to offer. This can help, even if you are facing a lot of adversity.
Research has shown that people who practice gratitude on a regular basis, even for a short while, have several benefits. It has been shown to increase positivity, improve self-esteem, help you sleep better, make you happier and reduce stress. It has even been shown to increase social connectedness and meaning and, in turn, wellbeing.