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I think you have an obligation to be an optimist. Because if you're not, nothing will change.

I don't know that I'd call myself an optimist.

I'm an optimist.

It takes a great deal of strength to be an optimist.

I'm always an optimist!

Well, I'm an optimist.

I may be an optimist.

I'm a serious optimist. I come from a country where you have little to be hopeful for, and so you have to always be an optimist.

I am an optimist. It does not seem too much use being anything else.

I'm an optimist by nature.