I am not an optimist, but a great believer of hope.

I am hopeful, though not full of hope, and the only reason I don't believe in happy endings is because I don't believe in endings.

To the question whether I am a pessimist or an optimist, I answer that my knowledge is pessimistic, but my willing and hoping are optimistic.

I tend to be a very optimistic person

I cannot be an optimist but I am a prisoner of hope.

The the question whether I am a pessimist or an optimist, I answer that my knowledge is pessimistic, but my willing and hope are optimistic.

I'm a pessimist about probabilities, I'm an optimist about possibilities.

I am not optimistic or pessimistic. I feel that optimism and pessimism are very unbalanced. I am a very hard engineer. I am a mechanic. I am a sailor. I am an air pilot. I don't tell people I can get you across the ocean with my ship unless I know what I'm talking about.

My hopes are not always realized, but I always hope.

I refuse to be pessimistic. I don't believe in it. I hope that we can find a way to keep from destroying the earth.

Be optimistic in general, but skeptical about the specifics.

I don’t believe in optimism. I believe in optimal behavior. That’s a different thing.

We just need to be more optimistic.

I didn’t consider myself an optimist by nature. Not that I was a pessimist. I generally tried to hover between the two, committing to neither.