Minimalistic lifestyle has a lot of benefits for mental wellness. Your stress levels are lowered, as you do not overwork yourself to get material things. You manage your time better because your priorities shift from consumption to being a better person. As a result, you care more about your own health, stay happy, and feel more connected to the world around. You discover what is really important for you, personally.
Through mental clarity, you see how you want to feel and not what you should feel, as dictated by society and marketers.