Anton Chekhov

Love, friendship and respect do not unite people as much as a common hatred for something.

Don't tell me the moon is shining; show me the glint of light on broken glass.

Knowledge is of no value unless you put it into practice.

It took me realizing that a broken heart has never actually killed anyone to find the courage to ask for what I want, in just about every situation. That was part of my own growing up.

I was good at being a doctor; my patients liked me. At times people trust you with things they wouldn't tell their spouses. It was a real privilege.

But with each passing year and each new study, the evidence for the genetic contribution to individual and group differences becomes more firmly established than ever.