When negative beliefs and assumptions start to consume you, then you will undoubtedly be unhappy in your life. However, if you have a positive mindset, then you’ll live a happier life. Ultimately, our perception is our reality, so actively changing the way you look at life can make all the difference. As Marcus Aurelius writes in Mediitations 3.9 Revere the faculty which produces opinion. On this faculty it entirely depends whether there shall exist in thy ruling part any opinion inconsistent with nature and the constitution of the rational animal. And this faculty promises freedom from hasty judgement, and friendship towards men, and obedience to the gods.A negative mindset will cloud your judgment, making it difficult to tell when negative thoughts are outside ourselves or a part of our inner psyche. If you find that negative thoughts and emotions constantly surround you, it may be time to change your mindset.