I’ve come to realize, it’s not that simple. In my view, it could also create a reverse effect, where when something doesn’t workout, one will start thinking that your mindset wasn’t right. Your mind (including your mindset) is heavily dependent upon your body’s state (physiology, biology). You can be forcing your mind to stop procrastinating, or stop being aggravated over little things when you only had 4 hours of sleep and you will likely fail. Same goes for when you consume junk (both literally and figuratively (food and content on the internet)). I’m not downplaying the importance of observing one’s thoughts and working on/adjusting your worldview, I just used to think the same way and pointing out that it’s not an absolute statement. But definitely an important one.