I was a bad practicing physician because I was never sure of the diagnosis or of the treatment.

To have the recognition of your colleagues is great. The public attention is a mixed blessing.

I'd like to put in a vote for the intrinsic fascination of science.

If it takes you 20 or 25 years to establish yourself in one field, you really ought to be careful not to stray too far.

If lifespan jumps by 30 or 40 years, that has enormous implications.

Although I am a public figure, I'm still a little shy. I don't think my own personality is important. I prefer to keep some small dosage of privacy.

By the time I was 12 or 13, I was studying biochemistry textbooks.