When we hear positive things, we always feel that eveeything that we will do will turn out the best. When we used to hear nice lines, our hearts always leap out of so much pleasure that we always earsed the word of failure in the vocabulary. When we always take praises, we learn not to appreciate the wonder it brings. One, who doesn't know what it feels to fall, never knew how to rise up the first time he did.
Criticism once been thrown have the power to change one's perspective. Judgements once never handle can destroy the living dreams in one's heart. Words like these can provoke someone to prove himself that he is not what they think he is.
Negative lines can make someone better knowing that no one believes but himself. These have always been their stepping stones to let the people believe what he can do for them.
Honestly, neither optimism nor pessimism is the best one the choices. It is how we took those words and work things out for the glory of someone who appreciates us the most. It is making yourself happy and living the life you wanted to live without stepping on others. It is about living in the best way using the best of both words.
Very nice article.