You have to be careful when you use beauty as a guide. There are many theories people didn't think were beautiful at the time but did find beautiful laterยand vice versa. I think simplicity is a good guide: The more economical a theory, the better.
Lisa RandallSpeculation and the exploration of ideas beyond what we know with certainty are what lead to progress.
Lisa RandallWhen I was in school I liked math because all the problems had answers. Everything else seemed very subjective.
Lisa Randall