"Oh, I'm crazy all right. I do have plenty of psychoses. Multiple personality, delusional dementia, OCD. I've got them all, but most of all, I'm crazy about you."

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I have always believed that scientific research is another domain where a form of optimism is essential to success: I have yet to meet a successful scientist who lacks the ability to exaggerate the importance of what he or she is doing, and I believe that someone who lacks a delusional sense of significance will wilt in the face of repeated experiences of multiple small failures and rare successes, the fate of most researchers.

— Daniel Kahneman