I would have to think of a particular kind of bird. Otherwise, I would not have enough of a vision in my mind to do it. If your goal is to become an optimist, specify exactly what you want to happen. Otherwise, nothing will happen. Think of examples.
Examples are more specific and useful than concepts and ideas.
Self-esteem is a concept. Loving your body the way it is is an example. Optimism is a concept. Even seeing the good side of things is little more than a concept. Giving people the benefit of the doubt, on the other hand, is an example of optimism.