Negativity is a poison that kills dreams and potential. It starts as negative thoughts that then turn into negative words and destructive criticism. Repeated negative thinking can lead to depression, mental disorders, and even physical ailments over time. To overcome negativity, one must monitor their thoughts for negativity, avoid making excuses, and instead focus on using positive, inspiring language. Being grateful for what one has and focusing on the good in all situations can help shift one's mindset from negative to positive.