Optimism is a choice that we make. You get to choose whether or not you will believe in every conspiracy theory that comes along. You have the ability to decide if you will be negative all the time. Or you can choose to be an optimist.
Optimism is a way of life, a worldview. An optimist chooses to think that things will turn out well. He believes that things are always looking up. He still thinks that he can win when he is down four runs with two outs in the bottom of the ninth. And the optimist believes this way, because he has decided to believe this way.
The choice to be an optimist is one that must be made every day. Each morning bad things will happen. There will be complaints and complainers. Tragedies will come. It would be easy to succumb to pessimism and negativity. That is why optimism must be chosen on a regular basis.
In the Bible we are told that love believes all things. In fact, in that passage, 1 Corinthians 13, we have a veritable laundry list of the attributes of love. We would not do it injustice if we were to believe that love is similar to optimism. Love endures all things; optimism never gives up. Love is kind; optimism wants others to do well.
So, there it is. Optimism is a way of life that comes from choices we make every day. It is not unlike love. So love your neighbors every day.