Pessimistic

"The optomist proclaims that we live in the best of all possible worlds; and the pessimist fears this is true."
~James Branch Cebell

I wish I was an optomist, but I am definitly a pessimist. Is it possible to change yourself into an optomist? Is it possible to re-shape how you veiw everything? Because I am a pessimist, my answer to these questions must be no, but I hope that I am wrong. Because I have hope, does that make me slightly optomistic? hmmm....