God said:
Optimism is not superficial. It is not pie in the sky. It is one of the most supportive tools in life you have.
Optimism is success-oriented. It is the opposite of pessimism. Pessimism is denial of what life could offer you if you were open to it.
Pessimism, upheld as realism, is definitely playing the odds that you see for yourself as not so hotsy-totsy. Odds are often not good, yet where is it written that life must be made up of playing only fabulous odds? In this way, you may well keep great opportunity away from you. Don't count yourself out so easily.
You may think you are super-intelligent to point out to yourself and to others how unlikely the chances may be of hitting your target. What do you care if you have a one in a thousand chances to win when you win? For sure, if you don't go for it, you won't win.
Let's consider for a moment that in having the courage to go for what you want regardless of the odds in or out of your favor, you are stirring nature. You give life an opportunity.
If you give up on yourself beforehand, you set a low vibration for achieving. If you have an idea to start a business, let's say, and everyone in the world says your idea will never work, and you give up on your idea, what are the odds of achieving your dream? They are nil.
This happens every day. Someone listens to someone else, and gives up his dream.