THE BRAIN

The Brain is the most intriguing organ of the human body. It uses about 20% of the total energy and is mostly made of fat. On an average, we have 30000 to 50000 thoughts per day.That's quite a lot actually, but surprisingly most of them are negative. On a study on students, it has been estimated that more than 60% of their spontaneous thoughts were negative.(https://www.psychologytoday.com/blog/sapient-nature/201310/how-negative-is-your-mental-chatter)

The Brain clearly has a negative bias, so why is that? The answer is very simple, Brain has evolved to anticipate danger and pain, hence, it's also more sensitive towards negative stimuli. So next time when you are having a negative thought don't be sad, your Brain is probably trying to save you from your troubles.